CN113302862A - Feedback techniques for wireless communications - Google Patents

Feedback techniques for wireless communications Download PDF

Info

Publication number
CN113302862A
CN113302862A CN202080009012.4A CN202080009012A CN113302862A CN 113302862 A CN113302862 A CN 113302862A CN 202080009012 A CN202080009012 A CN 202080009012A CN 113302862 A CN113302862 A CN 113302862A
Authority
CN
China
Prior art keywords
feedback signal
determining
packet
wireless communication
received power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202080009012.4A
Other languages
Chinese (zh)
Other versions
CN113302862B (en
Inventor
T·V·阮
K·古拉蒂
S·K·巴盖尔
A·巴拉德瓦杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of CN113302862A publication Critical patent/CN113302862A/en
Application granted granted Critical
Publication of CN113302862B publication Critical patent/CN113302862B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1893—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/189—Transmission or retransmission of more than one copy of a message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/262—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Methods, systems, and devices for wireless communication are described. The devices, which may otherwise be referred to as User Equipment (UE), may support sidelink communications, such as, for example, device-to-device (D2D) communications, vehicle-based communications, which may also be referred to as vehicle-to-anything (V2X) communications, vehicle-to-vehicle (V2V) communications, and so forth. To mitigate or reduce collisions or other interference on resources (e.g., time and frequency resources) used by other UEs in the sidelink communication, the UE may determine a blind retransmission of the packet, determine that the packet satisfies one or more conditions based in part on the blind retransmission, and transmit a feedback signal related to the blind retransmission of the packet.

Description

Feedback techniques for wireless communications
Cross-referencing
This patent application claims priority from U.S. patent application No.16/746,686 entitled "FEEDBACK TECHNIQUES FOR WIRELESS COMMUNICATIONS" filed on month 1, 17 2020 by NGUYEN et al, which claims benefit from U.S. provisional patent application No.62/794,684 entitled "FEEDBACK TECHNIQUES FOR VEHICLE-TO-EVERYTHING COMMUNICATIONS" filed on month 1, 20 2019 by NGUYEN et al, all of which are assigned TO the assignee of the present application.
Technical Field
The following relates to wireless communications, and more particularly to feedback techniques for sidelink communications.
Background
Communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems are capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems (e.g., Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, or LTE-a professional systems) and fifth generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems may employ techniques such as: code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM).
A wireless multiple-access communication system may include multiple base stations or network access nodes, each supporting communication for multiple communication devices (which may otherwise be referred to as User Equipment (UE)) simultaneously. Some wireless communication systems may support sidelink communications between communication devices (e.g., direct communications between multiple UEs). Examples of sidelink communications may include, but are not limited to, device-to-device (D2D) communications, vehicle-based communications (which may also be referred to as V2X networks, vehicle-to-vehicle (V2V) networks, cellular V2X (C-V2X) networks, and so forth).
Disclosure of Invention
A method of wireless communication at a first device in a wireless communication system is described. The method may include: determining a blind retransmission of the packet; determining, based on the blind retransmission, that the packet satisfies one or more conditions; and transmitting a feedback signal related to the blind retransmission of the packet based on determining that the packet satisfies the one or more conditions.
An apparatus for wireless communication in a wireless communication system is described. The apparatus may include a processor, a memory coupled to the processor, the processor and the memory configured to: determining a blind retransmission of the packet; determining, based on the blind retransmission, that the packet satisfies one or more conditions; and transmitting a feedback signal related to the blind retransmission of the packet based on the determination that the packet satisfies the one or more conditions.
Another apparatus for wireless communication in a wireless communication system is described. The apparatus may include: means for determining a blind retransmission of the packet; means for determining, based on the blind retransmission, that the packet satisfies one or more conditions; and means for transmitting a feedback signal related to the blind retransmission of the packet based on determining that the packet satisfies the one or more conditions.
A non-transitory computer-readable medium storing code for wireless communication at a first device in a wireless communication system is described. The code may include instructions executable by a processor to: determining a blind retransmission of the packet; determining, based on the blind retransmission, that the packet satisfies one or more conditions; and transmitting a feedback signal related to the blind retransmission of the packet based on the determination that the packet satisfies the one or more conditions.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein for determining that the packet satisfies the one or more conditions may also include operations, features, means, or instructions for: determining a hidden node condition associated with a first device in wireless communication with a second device based on: a Reference Signal Received Power (RSRP) of a packet, a non-line-of-sight (NLOS) condition associated with the second device in wireless communication with the first device, or a blocking condition associated with the first device in wireless communication with the second device, or a combination thereof. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the feedback signal is based on the hidden node condition.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: measuring the RSRP of the packet; and determining that the RSRP of the packet satisfies an RSRP threshold. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the feedback signal is based on the RSRP of the packet satisfying the RSRP threshold.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining the RSRP threshold. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining that the RSRP of the packet satisfies the RSRP threshold is based on the determined RSRP threshold.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining the RSRP threshold based on: a Modulation and Coding Scheme (MCS), a priority of the packet corresponding to the feedback signal, a quality of service (QoS) of the packet corresponding to the feedback signal, or a 5G quality indicator (5QI) of the packet corresponding to the feedback signal, or a combination thereof.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving control signaling from a network device comprising configuration information that maps the RSRP threshold to at least one of: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof; and determining the RSRP threshold based on the mapping.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving control signaling comprising configuration information from the second device, the configuration information comprising the RSRP threshold; and determining the RSRP threshold based on the configuration information.
In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the RSRP threshold is preconfigured, or configured by a network device, or a combination thereof.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining location information of the second device; and determining NLOS conditions associated with the second device in wireless communication with the first device based on the location information of the second device. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the location information of the second device indicates: a location of the second device compared to a location of the first device, a path loss estimate between the first device and the second device, or a combination thereof. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting the feedback signal is based on the NLOS condition.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein for determining that the packet satisfies the one or more conditions may also include operations, features, means, or instructions for: determining a blocking condition associated with a first device in wireless communication with a second device based on a path loss estimate between the first device and the second device. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the blocking condition comprises blocking a pedestrian, a building, or an obstruction, or a combination thereof, of a line of sight (LOS) path from the second device to the first device. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, transmitting the feedback signal is based on the blocking condition.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: collecting sensor information from a set of sensors of the first device. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining whether the occlusion condition is based on the collected sensor information. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of sensors comprises a camera, a radar, or a lidar, or a combination thereof.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving configuration information for configuring the first device to transmit a second feedback signal. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the configuration information includes the one or more conditions.
In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the wireless communication comprises a sidelink communication.
In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the sidelink communications comprise V2X communications or D2D communications.
A method of wireless communication at a first device in a wireless communication system is described. The method may include: receiving a feedback signal from a second device in the wireless communication system based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and excluding, from the one or more candidate resources, one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination.
An apparatus for wireless communication in a wireless communication system is described. The apparatus may include a processor, a memory coupled to the processor, the processor and the memory configured to: receiving a feedback signal from a second apparatus in the wireless communication system based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and excluding, from the one or more candidate resources, one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination.
Another apparatus for wireless communication in a wireless communication system is described. The apparatus may include: means for receiving a feedback signal from a second apparatus in the wireless communication system based on monitoring a feedback channel; means for determining that the feedback signal satisfies one or more conditions; and means for excluding, from the one or more candidate resources, one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination.
A non-transitory computer-readable medium storing code for wireless communication at a first device in a wireless communication system is described. The code may include instructions executable by a processor to: receiving a feedback signal from a second device in the wireless communication system based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and excluding, from the one or more candidate resources, one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving an indication of the one or more reserved resources corresponding to the feedback signal in a previous packet; and determining the one or more reserved resources corresponding to the feedback signal based on the indication. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, excluding from the one or more candidate resources the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal is based on the determined one or more reserved resources.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein for determining that the feedback signal satisfies the one or more conditions may also include operations, features, means, or instructions for: measuring an RSRP of the feedback signal based on monitoring the feedback channel; and determining that the RSRP of the feedback signal satisfies an RSRP threshold. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, excluding from the one or more candidate resources the one or more resources that overlap with the one or more reserved resources of the feedback signal is based on the RSRP of the feedback signal satisfying the RSRP threshold.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining the RSRP threshold based on: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, a previously transmitted 5QI, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving control signaling from a network device comprising configuration information that maps the RSRP threshold to at least one of: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof; and determining the RSRP threshold based on the mapping.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein for determining that the feedback signal satisfies the one or more conditions may also include operations, features, means, or instructions for: determining a distance between the first device and the second device in the wireless communication system; determining that the distance is greater than or equal to an excluded distance value for the first device; and determining that the excluded distance value for the second device excludes the one or more resources from the one or more candidate resources that overlap with the one or more reserved resources corresponding to the feedback signal.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving configuration information for configuring the first device to transmit a second feedback signal based at least in part on the one or more conditions.
A method of wireless communication at a first device in a wireless communication system is described. The method may include: selecting one or more resources; receiving a feedback signal from a second device in the wireless communication system based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and refrain from transmitting on the one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination.
An apparatus for wireless communication in a wireless communication system is described. The apparatus may include a processor, a memory coupled to the processor, the processor and the memory configured to: selecting one or more resources; receiving a feedback signal from a second apparatus in the wireless communication system based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and refrain from transmitting on the one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination.
Another apparatus for wireless communication in a wireless communication system is described. The apparatus may include: means for selecting one or more resources; means for receiving a feedback signal from a second apparatus in the wireless communication system based on monitoring a feedback channel; means for determining that the feedback signal satisfies one or more conditions; and means for refraining from transmitting on the one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination.
A non-transitory computer-readable medium storing code for wireless communication at a first device in a wireless communication system is described. The code may include instructions executable by a processor to: selecting one or more resources; receiving a feedback signal from a second device in the wireless communication system based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and refrain from transmitting on the one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining the one or more reserved resources corresponding to the feedback signal, wherein a condition of the one or more conditions comprises the one or more resources overlapping with the one or more reserved resources corresponding to the feedback signal; and transmitting an indication to refrain from transmitting on the one or more reserved resources based on the refraining.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving an indication of the one or more reserved resources corresponding to the feedback signal in a previous packet; and determining the one or more reserved resources corresponding to the feedback signal based on the indication. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, refraining from transmitting on the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal is based on the determined one or more reserved resources corresponding to the feedback signal.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein for determining that the feedback signal satisfies the one or more conditions may also include operations, features, means, or instructions for: measuring an RSRP of the feedback signal based on monitoring the feedback channel; and determining that the RSRP of the feedback signal satisfies an RSRP threshold. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, refraining from transmitting on the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal is based on the RSRP of the feedback signal satisfying the RSRP threshold.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining the RSRP threshold based on: an MCS, a priority of the packet, a QoS of the packet corresponding to the feedback signal, a previously transmitted 5QI, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving control signaling from a network device comprising configuration information that maps the RSRP threshold to at least one of: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof; and determining the RSRP threshold based on the mapping.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein for determining that the feedback signal satisfies the one or more conditions may also include operations, features, means, or instructions for: determining a distance between the first device and the second device in the wireless communication system; determining that the distance is greater than or equal to an excluded distance value for the first device; and determining that an excluded distance value of the second device excludes the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal, wherein refraining from transmitting on the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal is based on determining that the excluded distance value of the second device excludes the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal.
A method of wireless communication at a first device in a wireless communication system is described. The method may include: receiving a transmission comprising data from a second device; measuring the RSRP of the transmission; determining that the RSRP of the transmission is below the RSRP threshold; and transmit, to the second device, configuration information for configuring the second device to transmit a feedback signal based at least in part on one or more conditions.
An apparatus for wireless communication in a wireless communication system is described. The apparatus may include a processor, a memory coupled to the processor, the processor and the memory configured to: receiving a transmission comprising data from a second apparatus; measuring the RSRP of the transmission; determining that the RSRP of the transmission is below the RSRP threshold; and transmit, to the second apparatus, configuration information for configuring the second apparatus to transmit a feedback signal based at least in part on one or more conditions.
Another apparatus for wireless communication in a wireless communication system is described. The apparatus may include: means for receiving a transmission comprising data from a second apparatus; means for measuring the RSRP of the transmission; means for determining that the RSRP of the transmission is below the RSRP threshold; and means for transmitting, to the second apparatus, configuration information for configuring the second apparatus to transmit a feedback signal based at least in part on one or more conditions.
A non-transitory computer-readable medium storing code for wireless communication at a first device in a wireless communication system is described. The code may include instructions executable by a processor to: receiving a transmission comprising data from a second apparatus; measuring the RSRP of the transmission; determining that the RSRP of the transmission is below the RSRP threshold; and transmit, to the second apparatus, configuration information for configuring the second apparatus to transmit a feedback signal based at least in part on one or more conditions.
A method of wireless communication at a receiver device in a wireless communication system is described. The method may include: determining a blind retransmission opportunity of the packet; determining, based on the blind retransmission opportunity, that the packet includes data that satisfies a set of conditions; and sending a feedback message related to the blind retransmission of the packet based on determining that the packet satisfies the set of conditions.
An apparatus for wireless communication in a wireless communication system is described. The apparatus may include a processor, a memory coupled to the processor, the processor and the memory configured to: determining a blind retransmission opportunity of the packet; determining, based on the blind retransmission opportunity, that the packet includes data that satisfies a set of conditions; and sending a feedback message related to the blind retransmission of the packet based on determining that the packet satisfies the set of conditions.
Another apparatus for wireless communication in a wireless communication system is described. The apparatus may include: means for determining a blind retransmission opportunity for a packet; means for determining, based on the blind retransmission opportunity, that the packet includes data that satisfies a set of conditions; and means for sending a feedback message related to the blind retransmission of the packet based on determining that the packet satisfies the set of conditions.
A non-transitory computer-readable medium storing code for wireless communication at a receiver device in a wireless communication system is described. The code may include instructions executable by a processor to: determining a blind retransmission opportunity of the packet; determining, based on the blind retransmission opportunity, that the packet includes data that satisfies a set of conditions; and sending a feedback message related to the blind retransmission of the packet based on determining that the packet satisfies the set of conditions.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein for determining that the packet satisfies the set of conditions may also include operations, features, means, or instructions for: measuring the RSRP of the packet; and determining that the RSRP of the packet satisfies an RSRP threshold. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the feedback message may be based on the RSRP of the packet satisfying the RSRP threshold.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining the RSRP threshold. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining that the RSRP of the packet satisfies the RSRP threshold is based on the determined RSRP threshold.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining the RSRP threshold based on: an MCS, a priority of the packet, or a QoS of the packet, or a combination thereof.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving control signaling from a network device comprising configuration information that maps the RSRP threshold to at least one of: MCS, priority, or QoS, or a combination thereof; and determining the RSRP threshold based on the mapping.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving control signaling comprising configuration information from a transmitter device, the configuration information comprising the RSRP threshold; and determining the RSRP threshold based on the configuration information.
In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the RSRP threshold may be preconfigured.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein for determining that the packet satisfies the set of conditions may also include operations, features, means, or instructions for: determining an NLOS condition associated with a transmitter device in wireless communication with the receiver device based on location information of the transmitter device. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the location information of the receiver device, the path loss estimate between the receiver device and the transmitter device, or a combination thereof is compared to the location information of the transmitter device. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the feedback message may be based on the NLOS condition.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein for determining that the packet satisfies the set of conditions may also include operations, features, means, or instructions for: determining a blocking condition associated with a receiver device in wireless communication with a transmitter device based on a path loss estimate between the receiver device and the transmitter device. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the blocking condition comprises blocking a pedestrian, a building, or an obstruction, or a combination thereof, of the LOS path from the transmitter device to the receiver device. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the feedback message may be based on the blocking condition.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: collecting sensor information from a set of sensors of the receiver device, wherein determining the occlusion condition may also be based on the collected sensor information, wherein the set of sensors includes a camera, a radar, or a lidar, or a combination thereof.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving configuration information for configuring the receiver device to transmit a second feedback message, wherein the configuration information comprises the set of conditions.
A method of wireless communication at a transmitter device in a wireless communication system is described. The method may include: receiving a packet comprising a feedback message from at least one receiver device in the wireless communication system based on monitoring a feedback channel; determining that the feedback message satisfies a set of conditions; and excluding one or more reserved resources of the transmitter device that overlap with a set of reserved resources corresponding to the feedback message based on the determination.
An apparatus for wireless communication in a wireless communication system is described. The apparatus may include a processor, a memory coupled to the processor, the processor and the memory configured to: receiving a packet comprising a feedback message from at least one receiver device in the wireless communication system based on monitoring a feedback channel; determining that the feedback message satisfies a set of conditions; and excluding one or more reserved resources of the apparatus that overlap with a set of reserved resources corresponding to the feedback message based on the determination.
Another apparatus for wireless communication in a wireless communication system is described. The apparatus may include: means for receiving a packet comprising a feedback message from at least one receiver device in the wireless communication system based on monitoring a feedback channel; means for determining that the feedback message satisfies a set of conditions; and means for excluding one or more reserved resources of the apparatus that overlap with a set of reserved resources corresponding to the feedback message based on the determination.
A non-transitory computer-readable medium storing code for wireless communication at a transmitter device in a wireless communication system is described. The code may include instructions executable by a processor to: receiving a packet comprising a feedback message from at least one receiver device in the wireless communication system based on monitoring a feedback channel; determining that the feedback message satisfies a set of conditions; and excluding one or more reserved resources of the transmitter device that overlap with a set of reserved resources corresponding to the feedback message based on the determination.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving an indication of the set of reserved resources corresponding to the feedback message in a previous packet; and determining the set of reserved resources corresponding to the feedback message based on the indication. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, excluding the set of reserved resources corresponding to the feedback message may be based on determining the set of reserved resources.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining a distance between the transmitter device and the at least one receiver device in the wireless communication system; determining that the distance may be greater than or equal to an excluded distance value for the transmitter device; and determining that the excluded distance value for the transmitter device excludes the set of reserved resources corresponding to the feedback message. In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, excluding the set of reserved resources corresponding to the feedback message based on the exclusion distance value may be an indication to the at least one receiver device that the set of reserved resources may be available to the at least one receiver device.
In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, determining that the feedback message satisfies a condition may include operations, features, means, or instructions for: measuring an RSRP of the feedback message based on monitoring the feedback channel; and determining that the RSRP of the feedback message satisfies an RSRP threshold. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, excluding one or more reserved resources of the transmitter device that overlap with the set of reserved resources of the feedback message may be based on the RSRP of the feedback message satisfying the RSRP threshold. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, excluding one or more reserved resources of the transmitter device that overlap with the set of reserved resources corresponding to the feedback message based on the RSRP of the feedback message satisfying the RSRP threshold may be a second indication to the at least one receiver device that the set of reserved resources may be unavailable.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: determining the RSRP threshold based on: an MCS, a priority of the feedback message, or a QoS of the feedback message, or a combination thereof.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving control signaling from a network device comprising configuration information that maps the RSRP threshold to at least one of: MCS, priority, or QoS, or a combination thereof; and determining the RSRP threshold based on the mapping.
Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions to: receiving a second packet comprising data from the at least one receiver device; measuring the RSRP of the second packet; determining that the RSRP of the second packet may be below the RSRP threshold; and transmitting, to the at least one receiver device, configuration information for configuring the at least one receiver device to transmit a second feedback message based on a second set of conditions.
Drawings
Fig. 1 and 2 illustrate examples of wireless communication systems in accordance with one or more aspects of the present disclosure.
FIG. 3 illustrates an example of a process flow in accordance with one or more aspects of the present disclosure.
Fig. 4 and 5 illustrate block diagrams of devices according to one or more aspects of the present disclosure.
Fig. 6 illustrates a block diagram of a communication manager in accordance with one or more aspects of the disclosure.
Fig. 7 illustrates a diagram of a system including a device in accordance with one or more aspects of the present disclosure.
Fig. 8 to 14 show flow charts illustrating methods according to the present disclosure.
Detailed Description
A UE in a communication system that supports sidelink communications (e.g., direct communications between multiple UEs) may mitigate or reduce collisions or other interference on resources (e.g., time and frequency resources) used by other UEs. For example, a UE in a sidelink communication system (e.g., a D2D network, a V2V network, a C-V2X network, etc.) may avoid collisions or other interference on resources (e.g., time and frequency resources) used by other UEs. In some examples, the UE may transmit a reservation signal to reserve resources for packet transmission to other UEs in the sidelink communication system. Thus, a UE in a sidelink communication system may be aware of reserved resources of other UEs. In some cases, a transmitter UE in a sidelink communication system may reduce or eliminate possible collisions or other interference on reserved resources used by other UEs, e.g., by using an exclusion distance value or the like. The exclusion distance value may be a resource avoidance mechanism for the transmitter UE, e.g., an indication to avoid using resources that may overlap with resources reserved by other UEs in the sidelink communication system.
Some resource avoidance mechanism in a sidelink communication system, such as the resource avoidance mechanism outlined above, may effectively reduce interference between UEs when the UEs are in LOS. For example, in a highway sidelink communication environment including multiple UEs, each UE may be in a LOS to other UEs. Thus, a transmitter UE in a highway sidelink communication environment may use the resource avoidance outlined above to avoid using resources that may overlap with resources reserved by other UEs. Thus, in a highway sidelink communication environment, a transmitter UE may receive signals from other UEs and determine an RSRP for each of the received signals. The transmitter UE may then determine whether the RSRP of each of the received signals satisfies an RSRP threshold. Thus, the transmitter UE may avoid performing packet transmission on resources reserved by other UEs if the RSRP of the received signal satisfies the RSRP threshold. These mechanisms may ensure that other transmitting UEs using overlapping resources with the transmitter UE will be sufficiently far away from the receiving UE.
In some examples, the interference seen at the receiver UE may be controlled if all UEs are in LOS of each other. For example, the transmitter UE may determine reserved resources for other UEs based in part on the received reservation signal and distances from the transmitter UE to the other UEs. The transmitter UE may then determine one protection zone (also referred to herein as an exclusion distance value) that may be based in part on the communication range of the transmitter UE (e.g., the communication range of the packet transmission range based in part on the QoS indicator (e.g., 5QI) of the packet, etc.), and determine whether the distance to the other UE is inside or outside the protection zone. Thus, if the other UE is within the guard region, the transmitter UE may avoid performing packet transmission on resources reserved by the other UE (i.e., within the guard region and in the LOS to the transmitter UE).
In a highway sidelink communications environment example (e.g., V2V communications), three vehicles may be on the same path and in LOS of each other. In this example, the first vehicle (e.g., vehicle B) may not be in the protected zone of the second vehicle (e.g., vehicle a), and thus the resources of the first and second vehicles may overlap. In some examples, the signal transmitted by the first vehicle may impose strong interference (e.g., above a threshold) on the third vehicle (e.g., vehicle C) because their channel may be in the LOS. In addition, the signal transmitted by the second vehicle may impose strong interference (e.g., above a threshold) on the third vehicle (e.g., vehicle C) also because their channel may be in the LOS. However, the third vehicle may still decode the packet transmission because the signal-to-noise ratio (SINR) may be sufficiently high (e.g., above a threshold).
In the city sidelink communication environment example, the transmitter UE may be in NLOS to other UEs (e.g., receiver UEs). Thus, the receiver UE may be susceptible to interference from the transmitter UE. For example, in an urban sidelink communication environment (e.g., V2V communication), two vehicles that are not on the same path (e.g., road) may be in NLOS with each other (e.g., at an intersection). One of the two vehicles may be a transmitter and the other vehicle may be a receiver. Packet transmissions from the transmitter vehicle may interfere with receiver vehicle signaling (e.g., packet transmissions) if the receiver vehicle is not within the protected area of the transmitter vehicle. In other examples, the signal transmission from the transmitter vehicle may be weak because the transmitter vehicle and the receiver vehicle are in NLOS. However, the signal transmission from another transmitter vehicle that may be on the same path as the receiver vehicle may be strong.
Thus, signal transmission from another transmitter vehicle may interfere with receiving signal transmission from the transmitter vehicle (additionally, SINR may also be low). Thus, the receiver vehicle may not be able to decode the signal transmission from the transmitter vehicle due to strong interference from another transmitter vehicle. It may be advantageous to support feedback mechanisms (e.g., providing original transmitter UE information to improve a communication link (e.g., retransmission, updating MCS, transmission mode to reflect channel conditions, etc.)) for receiver UEs in a communication system supporting sidelink communications, such as a D2D system, a V2X system (or other systems, such as a V2V network, a C-V2X network), etc. To support interference avoidance for packet transmissions, a dedicated feedback channel may be used to enable the UE to provide feedback to other UEs in the communication system.
For example, in a V2X system, a packet may be sent or retransmitted multiple times. That is, for example, in a V2X multicast system, the retransmission may be based in part on a feedback-based transmission, or it may be a blind retransmission (e.g., not conditioned on receiving feedback). For example, a packet may be sent nTxWherein m isRTxOne will be a blind retransmission and there may be nTx-mRTxA feedback-based retransmission. For example, the transmitter UE may send an initial packet transmission (or retransmission) to other UEs in the V2X system. If at least one of the other UEs does not receive the initial packet transmission, the other UEs may send a feedback signal (also referred to as a feedback message or feedback packet) that will trigger the retransmission. Otherwise, it may not be necessary for the transmitter UE to transmit the feedback signal.
Upon receiving the feedback signal, the other UEs may already know the reserved resources for the retransmission of the initial packet and may therefore avoid using the reserved resources for the retransmission by the transmitter UE. Alternatively, the transmitter may perform blind retransmission to resolve half-duplex and control collisions (e.g., when the receiver UE is unable to detect the initial control information, in which case the receiver UE does not send a feedback message). For blind retransmissions, the transmitter UE may not need to receive any feedback from the receiving UE. However, to support interference avoidance for packet transmissions by the transmitter UE, the receiver UE may send packets including feedback signals to the transmitter UE and/or other transmitter UEs regardless of decoding packets for blind retransmissions by the transmitter UE. Thus, the feedback signal transmitted by the receiver UE may be used as a protection beacon for the receiver UE.
According to aspects of the present disclosure, in view of blind retransmissions, a receiver UE may send a feedback signal to a transmitter UE (including other UEs in a sidelink communication system) for use as a protection beacon based in part on a set of conditions. The condition set may include one or more conditions. In other words, the condition set may include a single condition or a plurality of conditions. In some examples, the receiver UE may send the packet including the feedback signal regardless of whether the receiver UE is able to decode the packet from the transmitter UE or unless explicitly signaled by the transmitter UE (e.g., a last retransmission indication, or there are resources unavailable for retransmission). Thus, the receiver UE may protect the resources in which retransmissions are expected to occur to prevent other UEs in the sidelink communication system from inadvertently using the same or overlapping resources and causing interference to the receiver UE. The set of conditions for feedback signal transmission may improve spatial reuse in a sidelink communication system. In some examples, the set of conditions may include, but is not limited to, a packet RSRP satisfying an RSRP threshold, an NLOS condition, a blocking condition, and/or the like.
According to other aspects of the disclosure, in view of blind retransmissions, a transmitter UE may instruct a receiver UE in a sidelink communication system (e.g., a V2X system) to transmit a feedback signal based in part on, for example, a set of conditions described herein. However, in some examples, the transmitter UE may refrain from instructing the receiver UE to send the feedback signal, e.g., when the feedback signal is the last retransmission or if there are no resources available for retransmission, or when the receiver UE does not need protection (e.g., the packets are intended only for UEs on the same road). In some examples, the transmitter UE may also perform blind retransmissions regardless of whether it received any feedback signals from the receiver UE. In addition, in a sidelink communication system that supports multicast sidelink communications, other transmitter UEs may receive feedback signals from receiver UEs and determine whether to exclude reserved resources of the receiver UEs from one or more candidate resources (or a candidate resource set, which may include one or more candidate resources) for their own transmissions based in part on a set of conditions. The set of conditions may include RSRP of the feedback signal, etc.
Accordingly, aspects of the present disclosure may provide for enhancements to the operation of UEs that support sidelink communications between multiple UEs, such as in D2D systems, V2X systems (or other systems such as V2V networks, C-V2X networks). For example, by enabling the receiver UE to send feedback signals to the transmitter UE and other transmitter UEs in the sidelink communication system in response to blind retransmissions of packets by the transmitter UE; operational characteristics (such as processor utilization and latency) associated with packet transmission by the receiver UE may be reduced. That is, by sending the feedback signal, the receiver UE may protect the reserved resources for packet transmissions it intends to receive, thereby improving the reliability of packet reception. Moreover, by configuring the set of conditions (e.g., RSRP thresholds) for feedback signal transmission, the receiver UE may experience additional enhancements to the operational characteristics (e.g., reduce resource utilization by avoiding undesired feedback signal transmissions).
Aspects of the present disclosure are first described in the context of a wireless communication system. Aspects are then described with respect to a process flow that supports feedback techniques for sidelink communications. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flow charts relating to feedback techniques for sidelink communications.
Fig. 1 illustrates an example of a wireless communication system 100 in accordance with one or more aspects of the present disclosure. The wireless communication system 100 includes base stations 105, UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be an LTE network, an LTE-a professional network, or an NR network. In some cases, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low cost and low complexity devices.
The base station 105 may communicate wirelessly with the UE115 via one or more base station antennas. The base stations 105 described herein may include or may be referred to by those skilled in the art as base station transceivers, radio base stations, access points, radio transceivers, node bs, evolved node bs (enbs), next generation node bs or gigabit node bs (any of which may be referred to as gnbs), home node bs, home evolved node bs, or some other suitable terminology. The wireless communication system 100 may include different types of base stations 105 (e.g., macro cell base stations or small cell base stations). The UE115 described herein is capable of communicating with various types of base stations 105 and network devices, including macro enbs, small cell enbs, gnbs, relay base stations, and the like.
Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 are supported. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via a communication link 125, and the communication link 125 between the base station 105 and the UE115 may utilize one or more carriers. The communication links 125 shown in the wireless communication system 100 may include: uplink transmissions from the UE115 to the base station 105, or downlink transmissions from the base station 105 to the UE 115. Downlink transmissions may also be referred to as forward link transmissions, and uplink transmissions may also be referred to as reverse link transmissions.
The geographic coverage area 110 for a base station 105 can be divided into sectors that form a portion of the geographic coverage area 110, and each sector can be associated with a cell. For example, each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other type of cell, or various combinations thereof. In some examples, the base stations 105 may be mobile and, thus, provide communication coverage for a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, and the overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or different base stations 105. The wireless communication system 100 may include, for example, heterogeneous LTE/LTE-a professional or NR networks, where different types of base stations 105 provide coverage for various geographic coverage areas 110.
The term "cell" refers to a logical communication entity used for communication with the base station 105 (e.g., on a carrier) and may be associated with an identifier (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID)) used to distinguish neighboring cells operating via the same or different carrier. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., Machine Type Communication (MTC), narrowband internet of things (NB-IoT), enhanced mobile broadband (eMBB), or other protocol types) that may provide access for different types of devices. In some cases, the term "cell" may refer to a portion (e.g., a sector) of geographic coverage area 110 over which a logical entity operates.
UEs 115 may be dispersed throughout the wireless communication system 100, and each UE115 may be stationary or mobile. The UE115 may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a user equipment, or some other suitable terminology, where a "device" may also be referred to as a unit, station, terminal, or client. The UE115 may also be a personal electronic device, such as a cellular telephone, a Personal Digital Assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, the UE115 may also refer to a Wireless Local Loop (WLL) station, an internet of things (IoT) device, an internet of everything (IoE) device, or an MTC device, etc., which may be implemented in various items such as appliances, vehicles, meters, etc.
Some UEs 115 (e.g., MTC or IoT devices) may be low cost or low complexity devices and may provide automated communication between machines (e.g., communication via machine-to-machine (M2M)). M2M communication or MTC may refer to data communication techniques that allow devices to communicate with each other or base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application that may utilize the information or present the information to a human interacting with the program or application. Some UEs 115 may be designed to collect information or implement automated behavior of machines. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, device monitoring, healthcare monitoring, wildlife monitoring, climate and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based billing for services.
Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception rather than simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power saving techniques for the UE115 include: a power-saving "deep sleep" mode is entered when not engaged in active communications or operating on a limited bandwidth (e.g., according to narrowband communications). In some cases, the UE115 may be designed to support critical functions (e.g., mission critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communication for these functions.
In some cases, the UE115 may also be able to communicate directly with other UEs 115 (e.g., using peer-to-peer (P2P) or D2D protocols). One or more UEs 115 in the group of UEs 115 communicating with D2D may be within the geographic coverage area 110 of the base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some cases, multiple groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1: M) system, where each UE115 transmits to every other UE115 in the group. In some cases, the base station 105 facilitates scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving base stations 105.
The base stations 105 may communicate with the core network 130 and with each other. For example, the base stations 105 may interface with the core network 130 over backhaul links 132 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via the core network 130) over backhaul links 134 (e.g., via X2, Xn, or other interfaces). UE115 may communicate with core network 130 via communication link 135.
Core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 may be an Evolved Packet Core (EPC) that may include at least one Mobility Management Entity (MME), at least one serving gateway (S-GW), and at least one Packet Data Network (PDN) gateway (P-GW). The MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC. User IP packets may be transported through the S-GW, which may itself be connected to the P-GW. The P-GW may provide IP address assignment as well as other functions. The P-GW may be connected to a network operator IP service. The operator IP services may include access to the internet, intranets, IP Multimedia Subsystem (IMS) or Packet Switched (PS) streaming services.
At least some of the network devices (e.g., base stations 105) may include subcomponents such as access network entities, which may be examples of Access Node Controllers (ANCs). Each access network entity may communicate with the UE115 through a plurality of other access network transport entities, which may be referred to as radio heads, intelligent radio heads, or transmission/reception points (TRPs). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., base station 105).
Wireless communication system 100 may operate using one or more frequency bands, in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The region from 300MHz to 3GHz is referred to as the Ultra High Frequency (UHF) region or decimeter band because the wavelength range is from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by building and environmental features. However, the waves may be sufficient to penetrate the structure for the macro cell to provide service to the UE115 located indoors. UHF-wave transmission can be associated with smaller antennas and shorter distances (e.g., less than 100km) than transmission of smaller and longer waves using the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum below 300 MHz. In some applications, the wireless communication system 100 may also operate in the ultra high frequency (SHF) region using a frequency band from 3GHz to 30GHz (also referred to as a centimeter frequency band). The SHF region includes frequency bands such as the 5GHz industrial, scientific, and medical (ISM) band, which may be opportunistically used by devices that can tolerate interference from other UEs.
The wireless communication system 100 may also operate in the Extremely High Frequency (EHF) region of the spectrum, e.g., from 30GHz to 300GHz (also referred to as the millimeter-band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communication between the UE115 and the base station 105, and EHF antennas of respective devices may be even smaller and more closely spaced compared to UHF antennas. In some cases, this may facilitate the use of antenna arrays within the UE 115. However, the propagation of EHF transmissions may suffer from even greater atmospheric attenuation and shorter distances than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the specified use of frequency bands across these frequency regions may differ depending on the country or regulatory agency.
In some cases, the wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ Licensed Assisted Access (LAA), LTE license-exempt (LTE-U) radio access technology, or NR technology in an unlicensed band (e.g., the 5GHz ISM band). When operating in the unlicensed radio frequency spectrum band, wireless devices (e.g., base station 105 and UE 115) may employ a Listen Before Talk (LBT) procedure to ensure that the frequency channel is idle before transmitting data. In some cases, operation in the unlicensed band may be based on a carrier aggregation configuration in conjunction with component carriers operating in the licensed band (e.g., LAA). Operations in the unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in the unlicensed spectrum may be based on Frequency Division Duplexing (FDD), Time Division Duplexing (TDD), or a combination of both.
In some examples, a base station 105 or UE115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. For example, the wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., base station 105) and a receiving device (e.g., UE 115), where the transmitting device is equipped with multiple antennas and the receiving device is equipped with one or more antennas. MIMO communication may employ multipath signal propagation to improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Likewise, a receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.
Beamforming (which may also be referred to as spatial filtering, directional transmission or directional reception) is a signal processing technique that: the techniques may be used at a transmitting device or a receiving device (e.g., base station 105 or UE 115) to form or steer an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by: signals transmitted via the antenna elements of the antenna array are combined such that signals propagating in a particular orientation relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjustment of the signal transmitted via the antenna element may comprise: a transmitting device or a receiving device applies certain amplitude and phase offsets to signals carried via each of the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to an antenna array of a transmitting device or a receiving device, or relative to some other orientation).
In one example, the base station 105 may use multiple antennas or antenna arrays for beamforming operations for directional communication with the UE 115. For example, the base station 105 may transmit some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) multiple times in different directions, which may include signals transmitted according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions may be used to determine beam directions (e.g., by a base station 105 or receiving device (e.g., UE 115)) for subsequent transmission and/or reception by the base station 105. The base station 105 may transmit some signals (e.g., data signals associated with a particular receiving device) in a single beam direction (e.g., a direction associated with the receiving device (e.g., UE 115)). In some examples, a beam direction associated with a transmission along a single beam direction may be determined based at least in part on signals transmitted in different beam directions. For example, the UE115 may receive one or more of the signals transmitted in different directions by the base station 105, and the UE115 may report an indication to the base station 105 of the signal it receives with the highest or otherwise acceptable signal quality. Although the techniques are described with reference to signals transmitted by the base station 105 in one or more directions, the UE115 may employ similar techniques to transmit signals multiple times in different directions (e.g., to determine a beam direction for subsequent transmission or reception by the UE 115) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).
When receiving various signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) from the base station 105, a receiving device (e.g., UE115, which may be an example of a mmW receiving device) may attempt multiple receive beams. For example, the receiving device may attempt multiple receive directions by receiving via different antenna sub-arrays, by processing received signals according to different antenna sub-arrays, by receiving according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array (any of the above operations may be referred to as "listening" according to different receive beams or receive directions). In some examples, a receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving data signals). The single receive beam may be aligned in a beam direction determined based at least in part on listening from different receive beam directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio, or otherwise acceptable signal quality based at least in part on listening from multiple beam directions).
In some cases, the antennas of a base station 105 or UE115 may be located within one or more antenna arrays that may support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some cases, the antennas or antenna arrays associated with the base station 105 may be located at different geographic locations. The base station 105 may have an antenna array with multiple rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with the UEs 115. Likewise, the UE115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
In some cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate on logical channels. A Medium Access Control (MAC) layer may perform priority processing and multiplexing of logical channels to transport channels. The MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmissions at the MAC layer to improve link efficiency. In the control plane, a Radio Resource Control (RRC) protocol layer may provide for the establishment, configuration, and maintenance of RRC connections between the UE115 and the base station 105 or core network 130 that support radio bearers for user plane data. At the physical layer, transport channels may be mapped to physical channels.
In some cases, the UE115 and the base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. HARQ feedback is a technique that increases the likelihood that data will be received correctly on the communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), Forward Error Correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer under poor radio conditions (e.g., signal-to-noise conditions). In some cases, a wireless device may support same slot HARQ feedback, where the device may provide HARQ feedback in a particular slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in subsequent time slots or according to some other time interval.
May be in basic time units (which may, for example, refer to T)sA sampling period of 1/30,720,000 seconds) to represent the time interval in LTE or NR. The time intervals of the communication resources may be organized according to radio frames each having a duration of 10 milliseconds (ms), where the frame period may be denoted as Tf＝307,200Ts. The radio frames may be identified by a System Frame Number (SFN) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. A subframe may also be divided into 2 slots, each slot having a duration of 0.5ms, and each slot may beContaining 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix added in front of each symbol period). Each symbol period may contain 2048 sample periods, excluding the cyclic prefix. In some cases, a subframe may be the smallest scheduling unit of the wireless communication system 100 and may be referred to as a transmission time interval. In other cases, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened transmission time intervals or in selected component carriers using shortened transmission time intervals). In some wireless communication systems, a slot may be further divided into a plurality of minislots comprising one or more symbols. In some examples, the symbol of the micro-slot or the micro-slot may be a minimum scheduling unit. Each symbol may vary in duration depending on, for example, the subcarrier spacing or frequency band of operation. Further, some wireless communication systems may implement timeslot aggregation, where multiple timeslots or minislots are aggregated together and used for communication between the UE115 and the base station 105.
The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over the communication link 125. For example, the carrier of the communication link 125 may include a portion of the radio frequency spectrum band that operates according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. The carriers may be associated with predefined frequency channels (e.g., evolved universal mobile telecommunications system terrestrial radio access (E-UTRA) absolute radio frequency channel numbers (EARFCNs)) and may be placed according to a channel grid for discovery by UEs 115. The carriers may be downlink or uplink (e.g., in FDD mode), or may be configured to carry downlink and uplink communications (e.g., in TDD mode). In some examples, the signal waveform transmitted on a carrier may be composed of multiple subcarriers (e.g., using multicarrier modulation (MCM) techniques such as Orthogonal Frequency Division Multiplexing (OFDM) or discrete fourier transform spread OFDM (DFT-S-OFDM)).
The organization of carriers may be different for different radio access technologies (e.g., LTE-A, LTE-a specialty, NR). For example, communications over carriers may be organized according to transmission time intervals or slots, each of which may include user data as well as control information or signaling to support decoding of the user data. The carriers may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) and control signaling that coordinates operation with respect to the carriers. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
The physical channels may be multiplexed on the carriers according to various techniques. For example, physical control channels and physical data channels may be multiplexed on a downlink carrier using Time Division Multiplexing (TDM) techniques, Frequency Division Multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples, the control information sent in the physical control channel may be distributed in a cascaded manner between different control regions (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).
The carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the carrier or "system bandwidth" of the wireless communication system 100. For example, the carrier bandwidth may be one of a plurality of predetermined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80MHz) of the carrier for the particular wireless access technology. In some examples, each served UE115 may be configured to operate over part or all of the carrier bandwidth. In other examples, some UEs 115 may be configured for operation using a narrowband protocol type associated with a predefined portion or range within a carrier (e.g., a set of subcarriers or RBs) (e.g., "in-band" deployment of narrowband protocol types).
In a system employing MCM technology, a resource element may consist of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme). Thus, the more resource elements the UE115 receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE 115. In a MIMO system, wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers), and the use of multiple spatial layers may further increase the data rate for communication with the UE 115.
Devices of the wireless communication system 100 (e.g., base stations 105 or UEs 115) may have a hardware configuration that supports communication over a particular carrier bandwidth or may be configurable to support communication over one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 and/or a UE115 capable of supporting simultaneous communication via carriers associated with more than one different carrier bandwidth. For example, the wireless communication system 100 may support communication with UEs 115 over multiple cells or carriers (a feature that may be referred to as carrier aggregation or multi-carrier operation). According to a carrier aggregation configuration, a UE115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used with both FDD and TDD component carriers.
In some cases, the wireless communication system 100 may utilize an enhanced component carrier (eCC). An eCC may be characterized by one or more features including: a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter transmission time interval duration, or a modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum). An eCC characterized by a wide carrier bandwidth may include one or more segments that may be used by UEs 115 that may not be able to monitor the entire carrier bandwidth or otherwise be configured to use a limited carrier bandwidth (e.g., to save power).
In some cases, an eCC may utilize a different symbol duration than other component carriers, which may include using a reduced symbol duration compared to the symbol duration of the other component carriers. Shorter symbol durations may be associated with increased spacing between adjacent subcarriers. A device utilizing an eCC (e.g., UE115 or base station 105) may transmit a wideband signal (e.g., according to a frequency channel or carrier bandwidth of 20, 40, 60, 80MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds). A transmission time interval in an eCC may consist of one or more symbol periods. In some cases, the transmission time interval duration (i.e., the number of symbol periods in the transmission time interval) may be variable. In addition, the wireless communication system 100 may be an NR system that may utilize any combination of licensed, shared, and unlicensed frequency spectrum bands. Flexibility in eCC symbol duration and subcarrier spacing may allow eCC to be used across multiple frequency spectrums. In some examples, NR sharing spectrum may improve spectrum utilization and spectral efficiency, particularly through dynamic vertical (e.g., across the frequency domain) and horizontal (e.g., across the time domain) sharing of resources.
Some examples of the wireless communication system 100 may support sidelink communications (e.g., direct communications between multiple UEs), such as D2D systems, V2X systems (or other systems such as V2V networks, C-V2X networks), and so forth. UEs 115 in a D2D system, a V2X system (or other systems such as a V2V network, a C-V2X network), etc., may have a direct connection, which may be a sidelink connection or a V2V/V2X connection. One or more UEs 115 may include a communication manager 101 that may manage sidelink communications. For the receiver UE115, the communication manager 101 may determine a blind retransmission of the packet from the transmitter UE, determine that the packet satisfies the set of conditions based in part on the blind retransmission, and send a feedback signal related to the blind retransmission of the packet. The communication manager 101 may receive a transmission including data from the UE115, measure an RSRP of the transmission, determine that the RSRP of the transmission is below an RSRP threshold, and send configuration information to the UE115 to configure the UE115 to send feedback signals based on one or more conditions.
Alternatively, for the transmitter UE115, the communication manager 101 may receive a packet including a feedback signal from at least one receiver UE115 in the wireless communication system 100 based in part on monitoring the feedback channel, determine that the feedback signal satisfies one or more conditions, and exclude one or more resources that overlap with one or more reserved resources corresponding to the feedback signal. In some examples, for the transmitter UE115, the communication manager 101 may select one or more resources, receive a feedback signal from a receiving UE115 in the wireless communication system 100 based on monitoring a feedback channel, determine that the feedback signal satisfies one or more conditions, and refrain from transmitting on one or more resources of the transmitter UE115 that overlap with the one or more reserved resources based on the determination. In some examples, the communication manager 101 may determine reserved resources corresponding to the feedback signal.
Accordingly, the wireless communication system 100 may provide enhancements to the operation of the UE115 that supports sidelink communications (e.g., V2X systems (or other systems such as V2V networks, C-V2X networks), etc.). For example, by enabling the receiver UE115 to send feedback signals to the transmitter UE115 and other transmitter UEs 115 in the V2X system in response to a blind retransmission of the packet by the transmitter UE 115; reliability associated with packet reception by the receiver UE115 may be improved. That is, by transmitting the feedback signal, the receiver UE115 can protect resources for its own packet reception, thereby improving the reliability of reception of the receiver UE 115. Moreover, by configuring the set of conditions (e.g., RSRP thresholds) for feedback signal transmission, receiver UE115 may experience additional enhancements to the operational characteristics (e.g., reducing resource utilization by avoiding undesired feedback signal transmissions).
Fig. 2 illustrates an example of a wireless communication system 200 in accordance with one or more aspects of the present disclosure. The wireless communication system 200 may include a UE 115-a, a UE 115-b, and a UE 115-c, which may be examples of corresponding devices described with reference to FIG. 1. UE 115-a and UE 115-b may be referred to herein as transmitter UEs, while UE 115-c may be referred to herein as receiver UEs. Although UE 115-a and UE 115-b are referred to herein as transmitter UEs, it should be understood that UE 115-a and UE 115-b are capable of receiving and transmitting information (e.g., packets). Similarly, although UE 115-c is referred to herein as a receiver UE, it should be understood that UE 115-c is capable of receiving and transmitting information. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. For example, the wireless communication system 200 may support interference avoidance by enabling feedback techniques for sidelink communications.
For example, the UE 115-a through 115-c may determine a packet for transmission. For example, the UE 115-a to the UE 115-c may determine one or more packets for transmission to other UEs in the wireless communication system 200 via a sidelink communication (e.g., a V2X communication). The UEs 115-a-115-c may perform multicast communications in order to maintain accurate system information (vehicle data, scheduled resources, etc.) and build a resource map for a time-frequency resource pool configured for V2X communications. Prior to packet transmission, UE 115-a to UE 115-c may transmit a reservation signal reserving resources for packet transmission. Thus, the UE 115-a through 115-c may be aware of the reserved resources of other UEs in the wireless communication system 200.
According to some techniques, UEs (such as UE 115-a through UE 115-c) may reduce possible collisions or other interference of reserved resources used by other UEs, e.g., by using exclusion distance values or the like. The exclusion distance value may be a resource avoidance mechanism for a UE, such as transmitter UE 115-a or transmitter UE 115-b. The excluded distance value may be used as an indication to the transmitter UE to avoid using resources that may overlap with one or more reserved resources by other UEs in the wireless communication system 200. Some techniques, such as one outlined herein, may effectively reduce interference between UEs 115-a-115-c when these UEs are in LOS.
In a highway V2X environment including multiple UEs, each UE may be in LOS to other UEs. Thus, a transmitter UE in a highway V2X environment may use the techniques outlined above to avoid using resources that may overlap with reserved resources of other UEs. For example, the transmitter UE 115-b may determine reserved resources for other UEs (e.g., other transmitter UE 115-a) based in part on the received reservation signal and the distance from the transmitter UE 115-b to the other UEs (e.g., other transmitter UE 115-a). The transmitter UE 115-b may then determine an exclusion distance value that may be based in part on a communication range (e.g., a communication range based in part on a QoS of a packet corresponding to the feedback signal or a packet transmission range of 5QI of the packet corresponding to the feedback signal, etc.), and determine whether the distance to other UEs (e.g., other transmitter UE 115-a) is within or outside the exclusion distance value. Thus, if another UE (e.g., another transmitter UE 115-a) is within the exclusion distance value of transmitter UE 115-b, transmitter UE 115-b may refrain from transmitting packets on the reserved resources of the other UE.
In one example, a transmitter UE may receive signals from other UEs and determine an RSRP for each of the received signals. The transmitter UE may then determine whether the RSRP of each of the received signals satisfies an RSRP threshold. Thus, the transmitter UE may refrain from performing packet transmission on the reserved resources of another UE if the RSRP of the received signal satisfies the RSRP threshold. In another example, the transmitter UE may receive signals from other UEs and determine distances between the transmitter UE and the other UEs. The transmitter UE may then determine whether a distance between the transmitter UE and each of the other UEs satisfies a distance exclusion threshold. Thus, the transmitter UE may avoid performing packet transmission on the reserved resources of other UEs if the distance satisfies the distance exclusion threshold. These mechanisms may ensure that other transmitting UEs using overlapping resources with the transmitter UE will be sufficiently far away from the receiving UE.
In some examples, if all UEs are in LOS of each other, this in turn may ensure that the interference seen at the receiver UE is well controlled. For example, in a highway V2X environment example that includes V2V communications, UEs 115-a-115-c may be three vehicles on the same or different paths and in LOS of each other. In this example, a first vehicle (e.g., UE 115-c) may not be in the protected zone of a second vehicle (e.g., UE 115-b), and thus the resources of the first and second vehicles may overlap. In some examples, the signal transmitted by the first vehicle may impose strong interference (e.g., above a threshold) on the third vehicle (e.g., UE 115-a) because their channel may be in the LOS. Additionally, the signal transmitted by the second vehicle may impose strong interference (e.g., above a threshold) on the third vehicle (e.g., UE 115-c) also because their channel may be in the LOS. However, the third vehicle may still decode the packet transmission because the SINR may be sufficiently high (e.g., above the threshold).
Alternatively, in a city (e.g., residential, commercial) V2X environment, a transmitter UE (e.g., transmitter UE 115-b) may be in NLOS to other UEs (e.g., receiver UEs, such as receiver UE 115-c). Thus, other UEs (e.g., receiver UE 115-c) may be susceptible to interference from a transmitter UE (e.g., transmitter UE 115-b). By way of example of V2V communication, the transmitter UE 115-b and the receiver UE 115-c may be in the same neighborhood (or in close proximity to each other) and may be in NLOS with each other (e.g., at an intersection, driving on the opposite side of a highway, etc.). Packet transmissions from the transmitter UE 115-b may interfere with receiver UE 115-c signaling (e.g., packet transmissions) if the receiver UE 115-c is not within the guard region of the transmitter UE 115-b. That is, if the receiver UE 115-c is not within the guard region of the transmitter UE 115-b, the packet transmission from the transmitter UE 115-b may interfere with the receiver UE 115-c signaling (e.g., packet transmission).
In other examples, because transmitter UE 115-b and receiver UE 115-c are in NLOS, the signal transmission from transmitter UE 115-b may be weak (e.g., below the RSRP threshold). However, the signal transmission from another transmitter UE 115-a, which may be on the same path as the receiver UE 115-c, may be strong (e.g., above the RSRP threshold). Thus, a signal transmission from another transmitter UE 115-a may interfere with receiving a signal transmission from the transmitter UE 115-b. Thus, the receiver UE 115-c may not be able to decode the signal transmission from the transmitter UE 115-b due to strong interference from another transmitter UE 115-a. To support interference avoidance for packet transmissions, a dedicated feedback channel may be used to enable the UEs 115-a-115-c to provide feedback to other UEs in the wireless communication system 200, and more particularly, to enable a receiver UE (such as the receiver UE 115-c) to provide feedback to (other) transmitter UEs in the wireless communication system 200.
In some examples, any one of UEs 115-a through 115-c may perform multiple packet transmissions and retransmissions. In the wireless communication system 200, the retransmission may be based on feedback. For example, the transmitter UE 115-b may send an initial packet transmission (or retransmission) to other UEs (e.g., other transmitter UEs 115-a or receiver UEs 115-c). If at least one of the other UEs (e.g., receiver UE 115-c) does not receive the initial packet transmission, e.g., due to NLOS, the other UE (e.g., receiver UE 115-c) may send a feedback signal that may be used as a retransmission acknowledgement for transmitter UE 115-b or a guard beacon for another transmitter UE 115-a. That is, transmitter UE 115-b may initiate a packet transmission (and initially reserve resources), receiver UE 115-c may send a feedback signal to confirm the reservation of resources, and transmitter UE 115-b may use the received feedback signal as a guard beacon to exclude resources.
Upon receiving the feedback signal, the transmitter UE 115-b may determine a retransmission based on the feedback signal, or determine whether to exclude one or more candidate resources of another transmitter UE 115-a, and may thus avoid using resources that overlap with one or more reserved resources. Alternatively, the transmitter UE 115-b may perform blind retransmission to resolve half-duplex and control collisions (e.g., when the receiver UE 115-c cannot detect the initial control information, in which case the receiver UE 115-c does not send a feedback signal). However, to support interference avoidance for packet transmissions by the transmitter UE 115-b (or another transmitter UE 115-a), the receiver UE 115-c may send feedback signals to the transmitter UE 115-b and/or another transmitter UE 115-a without regard to decoding of blindly retransmitted packets by the transmitter UE 115-b. Thus, the feedback signal transmitted by the receiver UE 115-c may be used as a protection beacon for the receiver UE 115-c.
In accordance with aspects of the present disclosure, in view of blind retransmissions, the receiver UE 115-c may send a feedback signal to the transmitter UE 115-b and/or another transmitter UE 115-a (including any other UE in the V2X system) for use as retransmission acknowledgements based in part on a set of conditions. The receiver UE 115-c may send the feedback signal regardless of whether there is a request for feedback from the transmitter UE 115-b or unless there is no feedback sent explicitly signaled by the transmitter UE 115-b (e.g., a last retransmission indication, or there are no available resources for retransmission). Thus, the receiver UE 115-c may protect the reserved resources in which it expects to receive retransmissions from the transmitter UE 115-b in the wireless communication system 200, to prevent inadvertent use of the reserved resources and interference to the receiver UE 115-c.
For example, the receiver UE 115-c may determine a blind retransmission of the packet associated with the transmitter UE 115-b. The receiver UE 115-c may determine that the packet satisfies the set of conditions based in part on the blind retransmission. The condition set may include one or more conditions. In other words, the condition set may include a single condition or a plurality of conditions. In one example, receiver UE 115-c may measure an RSRP of the packet and determine that the measured RSRP satisfies an RSRP threshold (e.g., a data RSRP threshold). In some examples, receiver UE 115-c may determine the RSRP threshold based in part on: the MCS, the priority of the packet corresponding to the feedback signal, the QoS of the packet corresponding to the feedback signal, or the 5QI of the packet corresponding to the feedback signal, or a combination thereof. In some examples, another transmitter UE 115-a may determine the RSRP threshold based in part on: the MCS, the priority of the packet corresponding to the feedback signal, the QoS of the packet corresponding to the feedback signal, or the 5QI of the packet corresponding to the feedback signal, or a combination thereof, and includes a threshold in the control signaling to the receiver UE 115-c such that both UEs use the same threshold. Alternatively, receiver UE 115-c may receive control signaling from a network device (e.g., referring to base station 105 of fig. 1) including configuration information that maps an RSRP threshold to at least one of: MCS, priority of the packet, QoS of the packet corresponding to the feedback signal, or 5QI of the packet corresponding to the feedback signal, or a combination thereof. In response, receiver UE 115-c may send a feedback signal related to a blind retransmission of the packet based in part on satisfying a set of conditions (e.g., an RSRP threshold).
In other examples, the receiver UE 115-c may determine NLOS conditions associated with the transmitter UE 115-b and/or other transmitter UEs 115-a. The NLOS condition may be determined based in part on: location information of the receiver UE 115-c compared to location information of the transmitter UE 115-b and/or another transmitter UE 115-a, a path loss estimate between the receiver UE 115-c and the transmitter UE 115-b and/or another transmitter UE 115-a, or a combination thereof. The receiver UE 115-c may then transmit a feedback signal related to blind retransmission of the packet based in part on determining the NLOS condition. Alternatively, the receiver UE 115-c may determine the blocking condition associated with the receiver UE 115-c, the transmitter UE 115-b, and/or another transmitter UE 115-a based in part on a path loss estimate between the receiver UE 115-c and the transmitter UE 115-b and/or another transmitter UE 115-a. The blocking condition may include blocking a pedestrian, building, or obstruction, or a combination thereof, of the LOS path from the transmitter UE 115-b and/or another transmitter UE 115-a to the receiver UE 115-c. The UEs 115-a through 115-c may be configured with a set of sensors to collect information. For example, receiver UE 115-c may collect sensor information from a set of sensors, which may include at least one of a camera, a motion sensor, a radar, a lidar, etc., to determine NLOS conditions, blocking conditions, etc.
According to other aspects of the disclosure, in view of blind retransmissions, transmitter UE 115-b may instruct receiver UE 115-c to send a feedback signal based in part on, for example, the set of conditions (e.g., RSRP) described above. However, in some examples, the transmitter UE 115-b may refrain from instructing the receiver UE 115-c to send a feedback signal, e.g., when the last retransmission is performed or if there are no available resources for retransmission, or when the receiver UE 115-c does not need protection (e.g., the packets are intended only for UEs on the same road). In some examples, the transmitter UE 115-b may also perform blind retransmissions regardless of whether it received any feedback signals from the receiver UE 115-c. Additionally, in supporting multicast sidelink communications, another transmitter UE 115-a may receive a feedback signal from a receiver UE 115-c and determine whether to exclude one or more candidate resources of the other transmitter UE 115-a, and may thus avoid using resources that overlap with one or more reserved resources. Thus, the feedback signal may not reserve any new resources, but only acknowledge resources reserved by another transmitter UE 115-a.
For example, another transmitter UE 115-a may receive a feedback signal from a receiver UE 115-c based in part on monitoring a feedback channel. Although the description of a single receiver UE is given by way of example, another transmitter UE may receive multiple feedback signals from multiple other receiver UEs by monitoring a feedback channel. As part of determining whether to exclude the reserved resources of the receiver UE 115-c, another transmitter UE 115-a may determine whether the feedback signal satisfies the set of conditions. In some examples, another transmitter UE 115-a may receive an indication of one or more reserved resources (or a set of reserved resources) corresponding to a feedback signal of a receiver UE 115-c in a previous packet and determine a set of reserved resources corresponding to the feedback signal based in part on the indication. The set of reserved resources may include one or more reserved resources.
Returning to the determination example, transmitter UE 115-b (or another transmitter UE 115-a) may measure an RSRP of the feedback signal and determine that the RSRP of the feedback signal satisfies an RSRP threshold (e.g., a feedback RSRP threshold). If the RSRP threshold is met, transmitter UE 115-b (or another transmitter UE 115-a) may exclude one or more candidate resources of another transmitter UE 115-a and may therefore avoid using resources that overlap with one or more reserved resources. In some examples, transmitter UE 115-b may determine the RSRP threshold based in part on: the MCS, the priority of the packet corresponding to the feedback signal, the QoS of the packet corresponding to the feedback signal, or the 5QI of the packet corresponding to the feedback signal, or a combination thereof, and then include the determined RSRP threshold in the control signaling.
Receiver UE 115-c may receive information related to the determined RSRP threshold in control signaling or the feedback signal may duplicate the information. Alternatively, in some examples, transmitter UE 115-b (or another transmitter UE 115-a) may determine the RSRP threshold based in part on: the MCS, the priority of the packet corresponding to the feedback signal, the QoS of the packet corresponding to the feedback signal, the previously transmitted 5QI, or the 5QI of the packet corresponding to the feedback signal, or a combination thereof. Alternatively, transmitter UE 115-b (or another transmitter UE 115-a) may receive control signaling from a network device (e.g., referring to base station 105 of fig. 1) including configuration information that maps an RSRP threshold to at least one of: the MCS, the priority of the packet corresponding to the feedback signal, the QoS of the packet corresponding to the feedback signal, or the 5QI of the packet corresponding to the feedback signal, or a combination thereof.
In other examples, if the reserved resources have been excluded when the receiver UE 115-c receives control signaling (e.g., a control message) from the transmitter UE 115-b (or another transmitter UE 115-a) based on the transmitter UE 115-b (or another transmitter UE 115-a) protection radius (i.e., an exclusion distance value), the transmitter UE 115-b (or another transmitter UE 115-a) may determine whether the feedback signal is received, or if the feedback signal is received and is below an RSRP threshold, the transmitter UE 115-b (or another transmitter UE 115-a) may not exclude one or more candidate resources of another transmitter UE 115-a, and thus may still use resources that overlap with the one or more reserved resources.
In some examples, the transmitter UE 115-b (or another transmitter UE 115-a) may determine a distance between itself and the receiver UE 115-c and determine that the distance is greater than or equal to an exclusion distance value set by the transmitter UE 115-b (or another transmitter UE 115-a). Accordingly, based on the distance and the excluded distance value, one or more reserved resources corresponding to the feedback signal are excluded from use by the transmitter UE 115-b (or another transmitter UE 115-a). If the reserved resources are not excluded based on the transmitter UE 115-b (or another transmitter UE 115-a) guard radius (i.e., an exclusion distance value), the transmitter UE 115-b (or another transmitter UE 115-a) may evaluate whether other conditions of the set, such as an RSRP threshold, are met.
Thus, the wireless communication system 200 may provide enhancements to the operation of UEs 115-a-115-C that support sidelink communications, such as a V2X system (or other systems such as a V2V network, a C-V2X network), and so forth. For example, by enabling the receiver UE 115-c to send feedback signals to the transmitter UE 115-b and other transmitter UEs 115-a in response to blind retransmission of packets by the transmitter UE 115-b; the reliability of the packet transmission of the other transmitter UE 115-a may be improved. That is, by sending the feedback signal, the receiver UE 115-c may protect its reserved resources for its own packet reception from being used by other transmitter UEs 115-a, thereby improving the reliability of receiving packets from other transmitter UEs 115-a. Moreover, by configuring the set of conditions (e.g., RSRP thresholds) for feedback signal transmission, receiver UE 115-c may experience additional enhancements to the operational characteristics (e.g., reduce resource utilization by avoiding undesired feedback signal transmissions).
Fig. 3 illustrates an example of a process flow 300 in accordance with one or more aspects of the present disclosure. In some examples, the process flow 300 may implement aspects of the wireless communication system 100 or 200. Process flow 300 may include UE 115-d, UE 115-e, and UE 115-f (which may be examples of corresponding devices described with reference to fig. 1 and 2). In the following description of process flow 300, operations between UE 115-d, UE 115-e, and UE 115-f may be transmitted in a different order than the exemplary order shown, or operations performed by UE 115-d, UE 115-e, and UE 115-f may be performed in a different order or at a different time. In some cases, certain operations may be omitted from the process flow 300 and/or other operations may be added to the process flow 300.
At 305, the UE 115-e may send packets to the UE 115-d and the UE 115-f (e.g., due to multicast communication). In some examples, the transmission by the UE 115-e may be a blind retransmission, as described herein. At 310, the UE 115-d may determine a blind retransmission of the packet. At 315, the UE 115-d may determine that the packet satisfies one or more conditions. For example, UE 115-d may measure an RSRP of the packet and determine that the RSRP of the packet satisfies an RSRP threshold. In another example, the UE 115-d may determine the NLOS condition between the UE 115-d and the UE 115-e based in part on: location information of the UE 115-d compared to location information of the UE 115-e, a path loss estimate between the UE 115-d and the UE 115-d, or a combination thereof.
In other examples, the UE 115-d may determine a blocking condition between the UE 115-d and the UE 115-e based in part on a path loss estimate between the UE 115-d and the UE 115-e. The blocking condition may include, for example: a vehicle blocking the LOS between the UE 115-d and the UE 115-e, a pedestrian blocking the LOS between the UE 115-d and the UE 115-e, a building blocking the LOS between the UE 115-d and the UE 115-e, or another obstacle blocking the LOS between the UE 115-d and the UE 115-e, or any combination thereof. The UE 115-d may make this determination based in part on, for example, collecting sensor information from a set of sensors (e.g., radar, lidar, cameras, etc.) local or remote to the UE 115-d. At 320, upon determining that the packet satisfies at least one of the one or more conditions, the UE 115-d may send a feedback signal related to a blind retransmission of the packet to the UE 115-e and/or the UE 115-f.
At 325, the UE 115-f (which may be another transmitter UE) may receive and determine that the feedback signal satisfies one of the one or more conditions. For example, UE 115-f may measure an RSRP of the feedback signal and determine that the RSRP of the feedback signal satisfies an RSRP threshold. The RSRP may be based in part on the MCS, a priority of a packet corresponding to the feedback signal, a QoS of a packet corresponding to the feedback signal, a previously transmitted 5QI, or a 5QI of a packet corresponding to the feedback signal, etc. At 330, the UE 115-f may exclude one or more resources that overlap with one or more reserved resources corresponding to the feedback signal. For example, based in part on the feedback signal satisfying at least one of the one or more conditions, the UE 115-f may exclude one or more resources that overlap with one or more reserved resources corresponding to the feedback signal. Thereby avoiding interference to UE 115-d.
Fig. 4 illustrates a block diagram 400 of a device 405 according to one or more aspects of the present disclosure. Device 405 may be an example of aspects of a device as described herein. The device 405 may include a receiver 410, a communication manager 415, and a transmitter 420. The device 405 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).
The receiver 410 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to feedback techniques for sidelink communications, etc.). Information may be passed to other components of device 405. The receiver 410 may be an example of aspects of the transceiver 720 described with reference to fig. 7. The receiver 410 may utilize a single antenna or a group of antennas.
The communication manager 415 may perform the following operations: determining a blind retransmission of the packet; determining that the packet satisfies one or more conditions based on the blind retransmission; and transmitting a feedback signal related to blind retransmission of the packet based on determining that the packet satisfies the one or more conditions. The communication manager 415 may also perform the following operations: receiving a feedback signal from a second device in the wireless communication system based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and excluding, from the one or more candidate resources, one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination. The communication manager 415 may perform the following operations: selecting one or more resources; receiving a feedback signal from a second device in the wireless communication system based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and refrain from transmitting on one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination. The communication manager 415 may perform the following operations: receiving a transmission including data from UE 115; measuring the transmitted RSRP; determining that a transmitted RSRP is below an RSRP threshold; and transmit configuration information to the UE115 for configuring the UE115 to transmit the feedback signal based on the one or more conditions. The communication manager 415 may be an example of aspects of the communication manager 710 described herein.
The communication manager 415 or subcomponents thereof may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 415 or its subcomponents may be performed by a general purpose processor, a DSP, an Application Specific Integrated Circuit (ASIC), an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.
The communication manager 415 or subcomponents thereof may be physically located at various locations, including being distributed such that some of the functionality is implemented by one or more physical components at different physical locations. In some examples, the communication manager 415 or subcomponents thereof may be separate and distinct components in accordance with various aspects of the present disclosure. In some examples, the communication manager 415 or subcomponents thereof may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof, in accordance with various aspects of the present disclosure.
Transmitter 420 may transmit signals generated by other components of device 405. In some examples, the transmitter 420 may be collocated with the receiver 410 in a transceiver component. For example, the transmitter 420 may be an example of aspects of the transceiver 720 described with reference to fig. 7. The transmitter 420 may utilize a single antenna or a group of antennas.
Fig. 5 illustrates a block diagram 500 of a device 505 in accordance with one or more aspects of the present disclosure. Device 505 may be an example of aspects of device 405 or device 115 as described herein. The device 505 may include a receiver 510, a communication manager 515, and a transmitter 540. The device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).
Receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to feedback techniques for sidelink communications, etc.). Information may be passed to other components of the device 505. The receiver 510 may be an example of aspects of the transceiver 720 described with reference to fig. 7. Receiver 510 may utilize a single antenna or a group of antennas.
The communication manager 515 may be an example of aspects of the communication manager 415 as described herein. The communication manager 515 can include a blind retransmission component 520, a condition component 525, a feedback component 530, and a resource component 535. The communication manager 515 may be an example of aspects of the communication manager 710 described herein.
Blind retransmission component 520 can determine blind retransmission of the packet. The condition component 525 may determine that the packet satisfies one or more conditions based on the blind retransmission. The feedback component 530 can transmit a feedback signal related to blind retransmission of a packet based on determining that the packet satisfies one or more conditions. The feedback component 530 may receive a feedback signal from a second device in the wireless communication system based on monitoring the feedback channel. The condition component 525 may determine that the feedback signal satisfies one or more conditions. Resource component 535 can exclude one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination. Resource component 535 can select one or more resources. The feedback component 530 may receive a feedback signal from a second device in the wireless communication system based on monitoring the feedback channel. The condition component 525 may determine that the feedback signal satisfies one or more conditions. Resource component 535 can refrain from transmitting on one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based at least in part on the determination.
Transmitter 540 may transmit signals generated by other components of device 505. In some examples, the transmitter 540 may be collocated with the receiver 510 in a transceiver component. For example, the transmitter 540 may be an example of aspects of the transceiver 720 described with reference to fig. 7. Transmitter 540 may utilize a single antenna or a group of antennas.
Fig. 6 illustrates a block diagram 600 in accordance with one or more aspects of the disclosure. The communication manager 605 may be an example of aspects of the communication manager 415, the communication manager 515, or the communication manager 710 described herein. The communications manager 605 can include a blind retransmission component 610, a condition component 615, a feedback component 620, a measurement component 625, a configuration component 630, a LOS/NLOS component 635, a blocking component 640, a sensor component 645, a resource component 650, and a distance component 655. Each of these components may be in direct or indirect communication with each other (e.g., via one or more buses).
Blind retransmission component 610 can determine blind retransmission of a packet. The condition component 615 can determine that the packet satisfies one or more conditions based on the blind retransmission. In some examples, the condition component 615 may determine that the feedback signal satisfies one or more conditions. The condition component 615 can determine a hidden node condition associated with a first device in wireless communication with a second device based on: the RSRP of the packet, an NLOS condition associated with a second device in wireless communication with the first device, or a blocking condition associated with the first device in wireless communication with the second device, or a combination thereof, wherein the sending the feedback signal may be based on the hidden node condition. The condition component 615 can determine that the feedback signal satisfies one or more conditions. The feedback component 620 can transmit a feedback signal related to blind retransmission of the packet based on determining that the packet satisfies one or more conditions. In some examples, feedback component 620 may receive a feedback signal from a second device (e.g., at least one receiver device) in the wireless communication system based on monitoring the feedback channel.
The resource component 650 can exclude one or more resources from the one or more candidate resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination. In some examples, resource component 650 can receive an indication of one or more reserved resources corresponding to the feedback signal in a previous packet. In some examples, resource component 650 may determine one or more reserved resources corresponding to the feedback signal based on the indication. In some examples, excluding from the one or more candidate resources one or more resources that overlap with one or more reserved resources corresponding to the feedback signal is based on the determined one or more reserved resources. In some examples, refraining from transmitting on the one or more reserved resources is based on the determined one or more reserved resources corresponding to the feedback signal. Resource component 650 can select one or more resources. Resource component 650 can refrain from transmitting on one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination. Resource component 650 can determine one or more reserved resources corresponding to the feedback signal, wherein a condition of the one or more conditions includes one or more resources overlapping with one or more reserved resources corresponding to the feedback signal; and transmitting an indication to refrain from transmitting on the one or more reserved resources based on the refraining.
Measurement component 625 may measure the RSRP of the packet. In some examples, measurement component 625 may determine that an RSRP of the packet satisfies an RSRP threshold, wherein sending the feedback signal may be based on the RSRP of the packet satisfying the RSRP threshold. Measurement component 625 may determine an RSRP threshold, wherein determining that the RSRP of the packet satisfies the RSRP threshold may be based on the determined RSRP threshold. In some examples, measurement component 625 may determine the RSRP threshold based on: the MCS, a priority of a packet corresponding to the feedback signal, a QoS of a packet corresponding to the feedback signal, or a combination thereof. The RSRP threshold may be pre-configured, or configured by the network device, or a combination thereof. In some examples, refraining from transmitting on one or more resources that overlap with one or more reserved resources corresponding to the feedback signal is based on RSRP of the feedback signal satisfying an RSRP threshold.
In some examples, measurement component 625 may measure RSRP of the feedback signal based on monitoring the feedback channel. Measurement component 625 may determine that an RSRP of the feedback signal satisfies an RSRP threshold, wherein excluding one or more resources from the one or more candidate resources that overlap with one or more reserved resources of the feedback signal may be based on the RSRP of the feedback signal satisfying the RSRP threshold. In some examples, measurement component 625 may determine the RSRP threshold based on: the MCS, the priority of the packet corresponding to the feedback signal, the QoS of the packet corresponding to the feedback signal, the previously transmitted 5QI, or the 5QI of the packet corresponding to the feedback signal, or a combination thereof. In some examples, the measurement component 625 may receive a transmission from the second device. Measurement component 625 may measure the RSRP of the transmission. Measurement component 625 may determine that the RSRP of the transmission is below the RSRP threshold.
Configuration component 630 may receive control signaling from a network device comprising configuration information that maps an RSRP threshold to at least one of: the MCS, the priority of the packet corresponding to the feedback signal, the QoS of the packet corresponding to the feedback signal, or the 5QI of the packet corresponding to the feedback signal, or a combination thereof. In some examples, configuration component 630 may determine the RSRP threshold based on the mapping. Configuration component 630 may receive control signaling from the second device comprising configuration information, the configuration information comprising an RSRP threshold, and determine the RSRP threshold based on the configuration information. In some examples, configuration component 630 may receive configuration information for configuring the first device to transmit the second feedback signal, wherein the configuration information includes one or more conditions. In some examples, configuration component 630 may send configuration information to the second device to configure the second device to send the second feedback signal based on one or more additional conditions.
LOS/NLOS component 635 may determine location information of the second device and determine NLOS conditions associated with a second device (e.g., a transmitter device) in wireless communication with the first device based on the location information of the second device. The location information of the second device indicates a location of the second device compared to a location of the first device (e.g., a receiver device), a path loss estimate between the first device and the second device, or a combination thereof, wherein transmitting the feedback signal may be based on the NLOS condition. The blocking component 640 can determine a blocking condition associated with a first device (e.g., a transmitter device) in wireless communication with a second device (e.g., a receiver device) based on a path LOSs estimate between the first device and the second device, wherein the blocking condition comprises blocking a pedestrian, a building, or an obstruction of a LOS path from the second device to the first device, or a combination thereof, wherein transmitting the feedback signal can be based on the blocking condition.
Sensor component 645 may collect sensor information from a set of sensors of the first device, wherein determining the occlusion condition may also be based on the collected sensor information, wherein the set of sensors includes a camera, a radar, or a lidar, or a combination thereof. The distance component 655 may determine a distance between a first device (e.g., a transmitter device) and a second device (e.g., a receiver device) in the wireless communication system. In some examples, the distance component 655 may determine that the distance is greater than or equal to an excluded distance value for the first device. In some examples, distance component 655 may determine that the excluded distance value for the second device excludes from the one or more candidate resources one or more resources that overlap with one or more reserved resources corresponding to the feedback signal.
Fig. 7 illustrates a diagram of a system 700 including a device 705 in accordance with one or more aspects of the present disclosure. Device 705 may be an example of device 405, device 505, or device 115 or a component comprising device 405, device 505, or UE115 as described herein. Device 705 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communications manager 710, an I/O controller 715, a transceiver 720, an antenna 725, a memory 730, and a processor 740. These components may be in electronic communication via one or more buses, such as bus 745.
The communication manager 710 may perform the following operations: determining a blind retransmission of the packet; determining that the packet satisfies one or more conditions based on the blind retransmission; and transmitting a feedback signal related to blind retransmission of the packet based on the determination. The communication manager 710 may also perform the following operations: receiving a feedback signal from a second device (e.g., at least one receiver device) based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and excluding, from the one or more candidate resources, one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination. The communication manager 710 may perform the following operations: selecting one or more resources; receiving a feedback signal from a second device in the wireless communication system based on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and refrain from transmitting on one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination.
I/O controller 715 may manage input and output signals for device 705. I/O controller 715 may also manage peripheral devices that are not integrated into device 705. In some cases, I/O controller 715 may represent a physical connection or port to an external peripheral device. In some cases, I/O controller 715 may utilize a memory such as
Figure BDA0003159892830000421
Figure BDA0003159892830000422
Such as an operating system or another known operating system. In other cases, I/O controller 715 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I/O controller 715 may be implemented as part of a processor. In some cases, a user may interact with device 705 via I/O controller 715 or via hardware components controlled by I/O controller 715.
The transceiver 720 may communicate bi-directionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 720 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 720 may also include a modem to modulate packets and provide the modulated packets to the antennas for transmission, as well as demodulate packets received from the antennas. In some examples, device 705 may include a single antenna 725. However, in some examples, device 705 may have more than one antenna 725 capable of simultaneously sending or receiving multiple wireless transmissions.
Memory 730 may include RAM and ROM. The memory 730 may store computer-readable, computer-executable code 735, the code 735 including instructions that when executed cause the processor to perform various functions described herein. In some cases, memory 730 may contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.
Code 735 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communications. Code 735 may be stored in a non-transitory computer-readable medium (e.g., system memory or other type of memory). In some cases, code 735 may not be directly executable by processor 740, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.
Processor 740 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combinations thereof). In some cases, processor 740 may be configured to operate the memory array using a memory controller. In other cases, the memory controller may be integrated into processor 740. Processor 740 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 730) to cause device 705 to perform various functions (e.g., functions or tasks that support feedback techniques for V2X communication).
Fig. 8 shows a flow diagram illustrating a method 800 in accordance with one or more aspects of the present disclosure. The operations of method 800 may be implemented by an apparatus as described herein or components thereof. For example, the operations of method 800 may be performed by a communication manager as described with reference to fig. 4-7. In some examples, a device may execute a set of instructions to control the functional units of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.
At 805, the device may determine a blind retransmission of the packet. The operations of 805 may be performed according to methods described herein. In some examples, aspects of the operations of 805 may be performed by a blind retransmission component as described with reference to fig. 4-7.
At 810, the device can determine that the packet satisfies one or more conditions based on the blind retransmission. The operations of 810 may be performed according to methods described herein. In some examples, aspects of the operations of 810 may be performed by a conditional component as described with reference to fig. 4-7.
At 815, the device may transmit a feedback signal related to blind retransmission of the packet based on determining that the packet satisfies one or more conditions. The operations of 815 may be performed according to methods described herein. In some examples, aspects of the operation of 815 may be performed by a feedback component as described with reference to fig. 4-7.
Fig. 9 shows a flow diagram illustrating a method 900 in accordance with one or more aspects of the present disclosure. The operations of method 900 may be implemented by an apparatus as described herein or components thereof. For example, the operations of method 900 may be performed by a communication manager as described with reference to fig. 4-7. In some examples, a device may execute a set of instructions to control the functional units of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.
At 905, the device may determine a blind retransmission of the packet. The operations of 905 may be performed according to methods described herein. In some examples, aspects of the operations of 905 may be performed by a blind retransmission component as described with reference to fig. 4-7.
At 910, the device may determine that the packet satisfies one or more conditions based on the blind retransmission. The operations of 910 may be performed according to methods described herein. In some examples, aspects of the operations of 910 may be performed by a conditional component as described with reference to fig. 4-7.
At 915, the device may measure RSRP of the packet. The operations of 915 may be performed according to the methods described herein. In some examples, aspects of the operations of 915 may be performed by a measurement component as described with reference to fig. 4-7.
At 920, the device may determine that the RSRP of the packet satisfies an RSRP threshold. In some examples, sending the feedback signal may be based on an RSRP of the packet satisfying an RSRP threshold. The operations of 920 may be performed according to methods described herein. In some examples, aspects of the operations of 920 may be performed by a measurement component as described with reference to fig. 4-7.
At 925, the device may send a feedback signal related to a blind retransmission of the packet based on the RSRP of the packet satisfying an RSRP threshold. The operations of 925 may be performed according to methods described herein. In some examples, aspects of the operations of 925 may be performed by a feedback component as described with reference to fig. 4-7.
Fig. 10 shows a flow diagram illustrating a method 1000 in accordance with one or more aspects of the present disclosure. The operations of method 1000 may be implemented by an apparatus as described herein or components thereof. For example, the operations of method 1000 may be performed by a communications manager as described with reference to fig. 4-7. In some examples, a device may execute a set of instructions to control the functional units of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.
At 1005, the device may determine a blind retransmission of the packet. The operations of 1005 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1005 may be performed by a blind retransmission component as described with reference to fig. 4-7.
At 1010, the device may determine that the packet satisfies one or more conditions based on the blind retransmission. The operations of 1010 may be performed according to the methods described herein. In some examples, aspects of the operations of 1010 may be performed by a conditional component as described with reference to fig. 4-7.
At 1015, the device may determine an NLOS condition associated with the second device based on location information of the second device, the location information of the second device indicating a location of the second device compared to the location of the device, a path loss estimate between the device and the second device, or a combination thereof. The operations of 1015 may be performed according to the methods described herein. In some examples, aspects of the operation of 1015 may be performed by LOS/NLOS components as described with reference to fig. 4-7.
At 1020, the device may transmit a feedback signal related to blind retransmission of the packet based on the NLOS condition. The operations of 1020 may be performed according to methods described herein. In some examples, aspects of the operations of 1020 may be performed by a feedback component as described with reference to fig. 4-7.
Fig. 11 shows a flow diagram illustrating a method 1100 in accordance with one or more aspects of the present disclosure. The operations of method 1100 may be implemented by an apparatus or components thereof as described herein. For example, the operations of method 1100 may be performed by a communications manager as described with reference to fig. 4-7. In some examples, a device may execute a set of instructions to control the functional units of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.
At 1105, the device may determine a blind retransmission of the packet. The operations of 1105 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1105 may be performed by a blind retransmission component as described with reference to fig. 4-7.
At 1110, the device may determine that the packet satisfies one or more conditions based on the blind retransmission. The operations of 1110 may be performed according to methods described herein. In some examples, aspects of the operations of 1110 may be performed by a conditional component as described with reference to fig. 4-7.
At 1115, the device may determine a blocking condition associated with the device in wireless communication with the second device based on a path loss estimate between the device and the second device. In some examples, the blocking condition may include: a pedestrian, a building, or an obstruction, or a combination thereof, blocking the LOS path from the transmitter device to the device. The operations of 1115 may be performed according to methods described herein. In some examples, aspects of the operation of 1115 may be performed by a blocking component as described with reference to fig. 4-7.
At 1120, the device may transmit a feedback signal related to blind retransmission of the packet based on the blocking condition. The operations of 1120 may be performed according to methods described herein. In some examples, aspects of the operations of 1120 may be performed by a feedback component as described with reference to fig. 4-7.
Fig. 12 shows a flow diagram illustrating a method 1200 in accordance with one or more aspects of the present disclosure. The operations of method 1200 may be implemented by an apparatus as described herein or components thereof. For example, the operations of method 1200 may be performed by a communications manager as described with reference to fig. 4-7. In some examples, a device may execute a set of instructions to control the functional units of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.
At 1205, the device may receive a feedback signal from the second device based on monitoring the feedback channel. The operations of 1205 may be performed according to methods described herein. In some examples, aspects of the operations of 1205 may be performed by a feedback component as described with reference to fig. 4-7.
At 1210, the device may determine that the feedback signal satisfies one or more conditions. The operations of 1210 may be performed according to methods described herein. In some examples, aspects of the operations of 1210 may be performed by a conditional component as described with reference to fig. 4-7.
At 1215, the device may exclude, from the one or more candidate resources, one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal based on the determination. The operations of 1215 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1215 may be performed by a resource component as described with reference to fig. 4-7.
Fig. 13 shows a flow diagram illustrating a method 1300 in accordance with one or more aspects of the present disclosure. The operations of method 1300 may be implemented by an apparatus as described herein or components thereof. For example, the operations of method 1300 may be performed by a communication manager as described with reference to fig. 4-7. In some examples, a device may execute a set of instructions to control the functional units of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.
At 1305, the device may select one or more resources for transmission. The operations of 1305 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1305 may be performed by a resource component as described with reference to fig. 4-7.
At 1310, the device may receive a feedback signal from a second device based on monitoring a feedback channel. The operations of 1310 may be performed according to methods described herein. In some examples, aspects of the operations of 1310 may be performed by a feedback component as described with reference to fig. 4-7.
At 1315, the device may determine that the feedback signal satisfies one or more conditions. The operations of 1315 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1315 may be performed by a conditional component as described with reference to fig. 4-7.
At 1320, the device may refrain from transmitting on one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based on the determination. The operations of 1320 may be performed according to the methods described herein. In some examples, aspects of the operations of 1320 may be performed by a conditional component as described with reference to fig. 4 to 7.
Fig. 14 shows a flow diagram illustrating a method 1400 in accordance with one or more aspects of the present disclosure. The operations of method 1400 may be implemented by an apparatus as described herein or components thereof. For example, the operations of method 1400 may be performed by a communication manager as described with reference to fig. 4-7. In some examples, a device may execute a set of instructions to control the functional units of the device to perform the functions described below. Additionally or alternatively, the device may use dedicated hardware to perform aspects of the functions described below.
At 1405, the device may receive a transmission including data from a second device. The operations of 1405 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1405 may be performed by a resource component as described with reference to fig. 4-7.
At 1410, the device may measure the transmitted RSRP. The operations of 1410 may be performed according to methods described herein. In some examples, aspects of the operations of 1410 may be performed by a measurement component as described with reference to fig. 4-7.
At 1415, the device may determine that the RSRP of the transmission is below the RSRP threshold. The operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operation of 1415 may be performed by a measurement component as described with reference to fig. 4-7.
At 1420, the device may transmit, to the second device, configuration information for configuring the second device to transmit the feedback signal based on one or more conditions. The operations of 1420 may be performed according to the methods described herein. In some examples, aspects of the operations of 1420 may be performed by a configuration component as described with reference to fig. 4-7.
Example 1: a method for wireless communication at a first device in a wireless communication system, comprising: determining a blind retransmission of the packet; determining, based at least in part on the blind retransmission, that the packet satisfies one or more conditions; and transmitting a feedback signal related to the blind retransmission of the packet based at least in part on determining that the packet satisfies the one or more conditions.
Example 2: the method of example 1, wherein determining that the packet satisfies the one or more conditions comprises: determining a hidden node condition associated with a first device in wireless communication with a second device based, at least in part, on: the RSRP of the packet, a non-line-of-sight condition associated with the second device in wireless communication with the first device, or a blocking condition associated with the first device in wireless communication with the second device, or a combination thereof, wherein the sending the feedback signal is based at least in part on a hidden node condition.
Example 3: the method of any of examples 1 or 2, further comprising: measuring the RSRP of the packet; and determining that the RSRP of the packet satisfies an RSRP threshold, wherein sending the feedback signal is based at least in part on the RSRP of the packet satisfying the RSRP threshold.
Example 4: the method of any of examples 1-3, further comprising: determining the RSRP threshold, wherein determining that the RSRP of the packet satisfies the RSRP threshold is based at least in part on the determined RSRP threshold.
Example 5: the method of any of examples 1-4, further comprising: determining the RSRP threshold based at least in part on: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof.
Example 6: the method of any of examples 1-5, further comprising: receiving control signaling from a network device comprising configuration information that maps the RSRP threshold to at least one of: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof; and determine the RSRP threshold based at least in part on the mapping.
Example 7: the method of any of examples 1-6, further comprising: receiving control signaling comprising configuration information from the second device, the configuration information comprising the RSRP threshold; and determine the RSRP threshold based at least in part on the configuration information.
Example 8: the method of any of examples 1 to 7, wherein the RSRP threshold is preconfigured, or configured by a network device, or a combination thereof.
Example 9: the method of any of examples 1-8, further comprising: determining location information of the second device; and determining the non-line-of-sight condition associated with the second device in wireless communication with the first device based at least in part on the location information of the second device, wherein the location information of the second device indicates: a location of the second device compared to a location of the first device, a path loss estimate between the first device and the second device, or a combination thereof, wherein transmitting the feedback signal is based at least in part on the non line-of-sight condition.
Example 10: the method of any of examples 1-9, wherein determining that the packet satisfies the one or more conditions comprises: determining a blocking condition associated with a first device in wireless communication with a second device based at least in part on a path loss estimate between the first device and the second device, wherein the blocking condition comprises a pedestrian, a building, or an obstruction, or a combination thereof, blocking a line-of-sight path from the second device to the first device, wherein transmitting the feedback signal is based at least in part on the blocking condition.
Example 11: the method of any of examples 1-10, further comprising: collecting sensor information from a set of sensors of the first device, wherein determining the occlusion condition is further based at least in part on the collected sensor information, wherein the set of sensors comprises a camera, a radar, or a lidar, or a combination thereof.
Example 12: the method of any of examples 1-11, further comprising: receiving configuration information for configuring the first device to transmit a second feedback signal, wherein the configuration information includes the one or more conditions.
Example 13: the method of any of examples 1 to 12, wherein the wireless communication comprises a sidelink communication.
Example 14: the method of any of examples 1-13, wherein the sidelink communications comprise vehicle-to-anything communications.
Example 15: the method of any of examples 1-14, further comprising: receiving configuration information for configuring the first device to transmit a second feedback signal based at least in part on the one or more conditions.
Example 16: a method for wireless communication at a first device in a wireless communication system, comprising: receiving a packet comprising a feedback signal from a second device in the wireless communication system based at least in part on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and excluding, based at least in part on the determining, one or more resources from the one or more candidate resources that overlap with the one or more reserved resources corresponding to the feedback signal.
Example 17: the method of example 16, further comprising: receiving an indication of the one or more reserved resources corresponding to the feedback signal in a previous packet; and determining the one or more reserved resources corresponding to the feedback signal based at least in part on the indication, wherein excluding the one or more resources from the one or more candidate resources that overlap with the one or more reserved resources corresponding to the feedback signal is based at least in part on the determined one or more reserved resources.
Example 18: the method of any of examples 16 or 17, wherein determining that the feedback signal satisfies the one or more conditions comprises: measuring an RSRP of the feedback signal based at least in part on monitoring the feedback channel; and determining that the RSRP of the feedback signal satisfies an RSRP threshold, wherein excluding the one or more resources from the one or more candidate resources that overlap with the one or more reserved resources of the feedback signal is based at least in part on the RSRP of the feedback signal satisfying the RSRP threshold.
Example 19: the method of any of examples 16 to 18, further comprising: determining the RSRP threshold based at least in part on: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, a previously transmitted 5QI, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof.
Example 20: the method of any of examples 16 to 19, further comprising: receiving control signaling from a network device comprising configuration information that maps the RSRP threshold to at least one of: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof.
Example 21: the method of any of examples 16 to 20, further comprising: determining the reference signal received power threshold based at least in part on the mapping.
Example 22: the method of any of examples 16 to 21, wherein determining that the feedback signal satisfies the one or more conditions comprises: determining a distance between the first device and the second device in the wireless communication system; determining that the distance is greater than or equal to an excluded distance value for the first device; and determining that the excluded distance value for the second device excludes the one or more resources from the one or more candidate resources that overlap with the one or more reserved resources corresponding to the feedback signal.
Example 23: a method for wireless communication at a first device in a wireless communication system, comprising: selecting one or more resources; receiving a feedback signal from a second device in the wireless communication system based at least in part on monitoring a feedback channel; determining that the feedback signal satisfies one or more conditions; and refrain from transmitting on the one or more resources that overlap with one or more reserved resources corresponding to the feedback signal based at least in part on the determination.
Example 24: the method of example 23, further comprising: determining the one or more reserved resources corresponding to the feedback signal, wherein a condition of the one or more conditions comprises the one or more resources overlapping with the one or more reserved resources corresponding to the feedback signal; and transmit an indication to refrain from transmitting the one or more reserved resources based at least in part on the refraining.
Example 25: the method of any of examples 23 or 24, further comprising: receiving an indication of the one or more reserved resources corresponding to the feedback signal in a previous packet; and determining the one or more reserved resources corresponding to the feedback signal based at least in part on the indication, wherein refraining from transmitting on the one or more reserved resources is based at least in part on the determined one or more reserved resources corresponding to the feedback signal.
Example 26: the method of any of examples 23 to 25, wherein determining that the feedback signal satisfies the one or more conditions comprises: measuring an RSRP of the feedback signal based at least in part on monitoring the feedback channel; and determining that the RSRP of the feedback signal satisfies an RSRP threshold, wherein refraining from transmitting on the one or more reserved resources that overlap with the one or more reserved resources corresponding to the feedback signal is based at least in part on the RSRP of the feedback signal satisfying the RSRP threshold.
Example 27: the method of any of examples 23 to 26, further comprising: determining the RSRP threshold based at least in part on: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, a previously transmitted 5QI, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof.
Example 28: the method of any of examples 23 to 27, further comprising: receiving control signaling from a network device comprising configuration information that maps the RSRP threshold to at least one of: an MCS, a priority of the packet corresponding to the feedback signal, a QoS of the packet corresponding to the feedback signal, or a 5QI of the packet corresponding to the feedback signal, or a combination thereof; and determine the RSRP threshold based at least in part on the mapping.
Example 29: the method of any of examples 23 to 28, wherein determining that the feedback signal satisfies the one or more conditions comprises: determining a distance between the first device and the second device in the wireless communication system; determining that the distance is greater than or equal to an excluded distance value for the first device; and determining that an excluded distance value of the second device excludes the one or more reserved resources that overlap with the one or more reserved resources corresponding to the feedback signal, wherein refraining from transmitting on the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal is based at least in part on determining that the excluded distance value of the second device excludes the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal.
Example 30: a method for wireless communication at a first device in a wireless communication system, comprising: receiving a transmission comprising data from a second device; measuring the RSRP of the transmission; determining that the RSRP of the transmission is below the RSRP threshold; and transmit, to the second device, configuration information for configuring the second device to transmit a feedback signal based at least in part on one or more conditions.
Example 31: an apparatus for wireless communication in a wireless communication system: a processor, a memory coupled to the processor, the processor and the memory configured to perform the method of any of examples 1-15.
Example 32: an apparatus comprising at least one means for performing the method of any of examples 1-15.
Example 33: a non-transitory computer-readable medium storing code for wireless communication in a wireless communication system, the code comprising instructions executable by a processor to perform the method of any of examples 1-15.
Example 34: an apparatus for wireless communication in a wireless communication system: a processor, a memory coupled to the processor, the processor and the memory configured to perform the method of any of examples 16-22.
Example 35: an apparatus comprising at least one means for performing the method of any of examples 16-22.
Example 36: a non-transitory computer-readable medium storing code for wireless communication in a wireless communication system, the code comprising instructions executable by a processor to perform the method of any of examples 16-22.
Example 37: an apparatus for wireless communication in a wireless communication system: a processor, a memory coupled to the processor, the processor and the memory configured to perform the method according to any of examples 23-29.
Example 38: an apparatus comprising at least one means for performing the method of any one of examples 23-29.
Example 39: a non-transitory computer-readable medium storing code for wireless communication in a wireless communication system, the code comprising instructions executable by a processor to perform the method of any of examples 23-29.
Example 40: an apparatus for wireless communication in a wireless communication system: a processor, a memory coupled to the processor, the processor and the memory configured to perform the method according to example 30.
Example 41: an apparatus comprising at least one means for performing the method of example 30.
Example 42: a non-transitory computer-readable medium storing code for wireless communication in a wireless communication system, the code comprising instructions executable by a processor to perform the method of example 30.
It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified, and that other implementations are possible. Further, aspects from two or more methods may be combined.
The techniques described herein may be used for various wireless communication systems such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other systems. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. The IS-2000 version may be generally referred to as CDMA 20001X, 1X, etc. IS-856(TIA-856) IS commonly referred to as CDMA 20001 xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes wideband CDMA (W-CDMA) and other variants of CDMA. TDMA systems may implement radio technologies such as global system for mobile communications (GSM).
The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE)802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, flash-OFDM, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE, LTE-A and LTE-A specialties are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, LTE-A specialty, NR, and GSM are described in documents from an organization named "3 rd Generation partnership project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "3 rd generation partnership project 2" (3GPP 2). The techniques described herein may be used for the systems and radio techniques mentioned herein as well as other systems and radio techniques. Although aspects of the LTE, LTE-A, LTE-a specialty, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-a specialty, or NR terminology may be used in much of the description, the techniques described herein may be applicable to ranges outside of LTE, LTE-A, LTE-a specialty, or NR applications.
A macro cell covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider. A small cell may be associated with a lower power base station than a macro cell, and the small cell may operate in the same or different (e.g., licensed, unlicensed, etc.) frequency band as the macro cell. According to various examples, the small cells may include pico cells, femto cells, and micro cells. For example, a pico cell may cover a small geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider. A femto cell may also cover a small geographic area (e.g., a residence) and may provide restricted access by UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in the residence, etc.). An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, pico eNB, femto eNB, or home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells and may also support communication using one or more component carriers. The gNB for a macro cell may be referred to as a macro gNB. A gNB for a small cell may be referred to as a small cell gNB, pico gNB, femto gNB, or home gNB. The gNB may support one or more (e.g., two, three, four, etc.) cells (e.g., component carriers).
The wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, the base stations may have different frame timings, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operations.
The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and the following claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. Features implementing functions may also be physically located at various locations, including being distributed such that portions of functions are implemented at different physical locations.
Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Non-transitory storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can comprise Random Access Memory (RAM), Read Only Memory (ROM), electrically erasable programmable ROM (eeprom), flash memory, Compact Disc (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Further, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes CD, laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.
As used herein (including in the claims), an "or" as used in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list such that, for example, a list of at least one of A, B or C means a or B or C or AB or AC or BC or ABC (i.e., a and B and C). Further, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an exemplary step described as "based on condition a" may be based on both condition a and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on" is interpreted.
In the drawings, similar components or features may have the same reference numerals. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description applies to any one of the similar components having the same first reference label irrespective of the second or other subsequent reference label.
The description set forth herein in connection with the appended drawings describes example configurations and is not intended to represent all examples that may be implemented or within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration," rather than "preferred" or "advantageous over other examples. The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.
The description herein is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (30)

1. A method for wireless communication at a first device in a wireless communication system, comprising:
determining a blind retransmission of the packet;
determining, based at least in part on the blind retransmission, that the packet satisfies one or more conditions; and
transmitting a feedback signal related to the blind retransmission of the packet based at least in part on determining that the packet satisfies the one or more conditions.
2. The method of claim 1, wherein determining that the packet satisfies the one or more conditions comprises:
determining a hidden node condition associated with a first device in wireless communication with a second device based, at least in part, on: a reference signal received power of the packet, a non-line-of-sight condition associated with the second device in wireless communication with the first device, or a blocking condition associated with the first device in wireless communication with the second device, or a combination thereof, wherein transmitting the feedback signal is based at least in part on the hidden node condition.
3. The method of claim 2, further comprising:
measuring the reference signal received power of the packet; and
determining that the reference signal received power of the packet satisfies a reference signal received power threshold,
wherein transmitting the feedback signal is based at least in part on the reference signal received power of the packet satisfying the reference signal received power threshold.
4. The method of claim 3, further comprising:
determining the reference signal received power threshold, wherein determining that the reference signal received power of the packet satisfies the reference signal received power threshold is based at least in part on the determined reference signal received power threshold.
5. The method of claim 3, further comprising:
determining the reference signal received power threshold based at least in part on: a modulation coding scheme, a priority of the packet corresponding to the feedback signal, a quality of service of the packet corresponding to the feedback signal, or a fifth generation quality indicator of the packet corresponding to the feedback signal, or a combination thereof.
6. The method of claim 3, further comprising:
receiving control signaling from a network device including configuration information that maps the reference signal received power threshold to at least one of: a modulation coding scheme, a priority of the packet corresponding to the feedback signal, a quality of service of the packet corresponding to the feedback signal, or a fifth generation quality indicator of the packet corresponding to the feedback signal, or a combination thereof; and
determining the reference signal received power threshold based at least in part on the mapping.
7. The method of claim 3, further comprising:
receiving control signaling comprising configuration information from the second device, the configuration information comprising the reference signal received power threshold; and
determining the reference signal received power threshold based at least in part on the configuration information.
8. The method of claim 3, wherein the reference signal received power threshold is preconfigured or configured by a network device, or a combination thereof.
9. The method of claim 2, further comprising:
determining location information of the second device;
determining the non-line-of-sight condition associated with the second device in wireless communication with the first device based at least in part on the location information of the second device, wherein the location information of the second device indicates: a location of the second device compared to a location of the first device, a path loss estimate between the first device and the second device, or a combination thereof,
wherein transmitting the feedback signal is based at least in part on the non-line-of-sight condition.
10. The method of claim 1, wherein determining that the packet satisfies the one or more conditions comprises:
determining a blocking condition associated with a first device in wireless communication with a second device based at least in part on a path loss estimate between the first device and the second device, wherein the blocking condition comprises a pedestrian, a building, or an obstruction, or a combination thereof, blocking a line-of-sight path from the second device to the first device,
wherein transmitting the feedback signal is based at least in part on the blocking condition.
11. The method of claim 10, further comprising:
collecting sensor information from a set of sensors of the first device, wherein determining the occlusion condition is further based at least in part on the collected sensor information,
wherein the set of sensors comprises a camera, radar, or lidar, or a combination thereof.
12. The method of claim 1, further comprising:
receiving configuration information for configuring the first device to transmit a second feedback signal, wherein the configuration information includes the one or more conditions.
13. The method of claim 1, wherein the wireless communication comprises a sidelink communication.
14. The method of claim 13, wherein the sidelink communications comprise vehicle-to-anything communications.
15. The method of claim 1, further comprising:
receiving configuration information for configuring the first device to transmit a second feedback signal based at least in part on the one or more conditions.
16. A method for wireless communication at a first device in a wireless communication system, comprising:
receiving a feedback signal from a second device in the wireless communication system based at least in part on monitoring a feedback channel;
determining that the feedback signal satisfies one or more conditions; and
excluding, based at least in part on the determining, one or more resources from one or more candidate resources that overlap with one or more reserved resources corresponding to the feedback signal.
17. The method of claim 16, further comprising:
receiving an indication of the one or more reserved resources corresponding to the feedback signal in a previous packet; and
determining the one or more reserved resources corresponding to the feedback signal based at least in part on the indication, wherein excluding the one or more resources from the one or more candidate resources that overlap with the one or more reserved resources corresponding to the feedback signal is based at least in part on the determined one or more reserved resources.
18. The method of claim 17, wherein determining that the feedback signal satisfies the one or more conditions comprises:
measuring a reference signal received power of the feedback signal based at least in part on monitoring the feedback channel; and
determining that the reference signal received power of the feedback signal satisfies a reference signal received power threshold, wherein excluding the one or more resources from the one or more candidate resources that overlap with the one or more reserved resources of the feedback signal is based at least in part on the reference signal received power of the feedback signal satisfying the reference signal received power threshold.
19. The method of claim 18, further comprising:
determining the reference signal received power threshold based at least in part on: a modulation coding scheme, a priority of the packet corresponding to the feedback signal, a quality of service of the packet corresponding to the feedback signal, a previously transmitted fifth generation quality indicator, or a combination thereof.
20. The method of claim 18, further comprising:
receiving control signaling from a network device including configuration information that maps the reference signal received power threshold to at least one of: a modulation coding scheme, a priority of the packet corresponding to the feedback signal, a quality of service of the packet corresponding to the feedback signal, or a fifth generation quality indicator of the packet corresponding to the feedback signal, or a combination thereof.
21. The method of claim 20, further comprising:
determining the reference signal received power threshold based at least in part on the mapping.
22. The method of claim 16, wherein determining that the feedback signal satisfies the one or more conditions comprises:
determining a distance between the first device and the second device in the wireless communication system;
determining that the distance is greater than or equal to an excluded distance value for the first device; and
determining that the excluded distance value for the second device excludes the one or more resources from the one or more candidate resources that overlap with the one or more reserved resources corresponding to the feedback signal.
23. A method for wireless communication at a first device in a wireless communication system, comprising:
selecting one or more resources for transmission;
receiving a packet comprising a feedback signal from a second device in the wireless communication system based at least in part on monitoring a feedback channel;
determining that the feedback signal satisfies one or more conditions;
refrain from transmitting on one or more reserved resources corresponding to the feedback signal based at least in part on the determination.
24. The method of claim 23, further comprising:
determining the one or more reserved resources corresponding to the feedback signal, wherein a condition of the one or more conditions comprises the one or more resources overlapping with the one or more reserved resources corresponding to the feedback signal; and
transmitting an indication to refrain from transmitting the one or more reserved resources based on the refraining.
25. The method of claim 23, further comprising:
receiving an indication of the one or more reserved resources corresponding to the feedback signal in a previous packet; and
determining the one or more reserved resources corresponding to the feedback signal based at least in part on the indication, wherein refraining from transmitting on the one or more reserved resources is based at least in part on the determined one or more reserved resources corresponding to the feedback signal.
26. The method of claim 23, wherein determining that the feedback signal satisfies the one or more conditions comprises:
measuring a reference signal received power of the feedback signal based at least in part on monitoring the feedback channel; and
determining that the reference signal received power of the feedback signal satisfies a reference signal received power threshold, wherein refraining from transmitting on the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal is based at least in part on the reference signal received power of the feedback signal satisfying the reference signal received power threshold.
27. The method of claim 25, further comprising:
determining the reference signal received power threshold based at least in part on: a modulation coding scheme, a priority of the packet corresponding to the feedback signal, a quality of service of the packet corresponding to the feedback signal, or a previously transmitted fifth generation quality indicator, or a combination thereof.
28. The method of claim 25, further comprising:
receiving control signaling from a network device including configuration information that maps the reference signal received power threshold to at least one of: a modulation coding scheme, a priority of the packet corresponding to the feedback signal, a quality of service of the packet corresponding to the feedback signal, or a fifth generation quality indicator of the packet corresponding to the feedback signal, or a combination thereof; and
determining the reference signal received power threshold based at least in part on the mapping.
29. The method of claim 23, wherein determining that the feedback signal satisfies the one or more conditions comprises:
determining a distance between the first device and the second device in the wireless communication system;
determining that the distance is greater than or equal to an excluded distance value for the first device; and
determining that an excluded distance value of the second device excludes the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal, wherein refraining from transmitting on the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal is based on determining that the excluded distance value of the second device excludes the one or more resources that overlap with the one or more reserved resources corresponding to the feedback signal.
30. A method for wireless communication at a first device in a wireless communication system, comprising:
receiving a transmission comprising data from a second device;
measuring the transmitted reference signal received power;
determining that the reference signal received power of the transmission is below a reference signal received power threshold; and
transmitting, to the second device, configuration information to configure the second device to transmit a feedback signal based at least in part on one or more conditions.
CN202080009012.4A 2019-01-20 2020-01-18 Feedback techniques for wireless communications Active CN113302862B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US201962794684P 2019-01-20 2019-01-20
US62/794,684 2019-01-20
US16/746,686 US11239941B2 (en) 2019-01-20 2020-01-17 Feedback techniques for wireless communications
US16/746,686 2020-01-17
PCT/US2020/014231 WO2020150696A2 (en) 2019-01-20 2020-01-18 Feedback techniques for wireless communications

Publications (2)

Publication Number Publication Date
CN113302862A true CN113302862A (en) 2021-08-24
CN113302862B CN113302862B (en) 2024-06-07

Family

ID=71609314

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202080009012.4A Active CN113302862B (en) 2019-01-20 2020-01-18 Feedback techniques for wireless communications

Country Status (4)

Country Link
US (1) US11239941B2 (en)
EP (1) EP3912294A2 (en)
CN (1) CN113302862B (en)
WO (1) WO2020150696A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11044129B2 (en) * 2017-12-21 2021-06-22 Qualcomm Incorporated Hierarchical communication for device-to-device communications
WO2020220291A1 (en) * 2019-04-30 2020-11-05 Lenovo (Beijing) Limited Method and apparatus for sidelink resource allocation
US20220256463A1 (en) * 2019-06-10 2022-08-11 Beijing Xiaomi Mobile Software Co., Ltd. Method and device for feeding back harq, and readable storage medium
US11350293B2 (en) * 2019-11-26 2022-05-31 Huawei Technologies Co., Ltd. Systems and methods for estimating locations of signal shadowing obstructions and signal reflectors in a wireless communications network
US20210314966A1 (en) * 2020-04-03 2021-10-07 Comcast Cable Communications, Llc Wireless Resource Selection
US11974276B2 (en) * 2020-10-22 2024-04-30 Qualcomm Incorporated Techniques for sidelink preemption indications in wireless communications systems
WO2022178062A1 (en) * 2021-02-17 2022-08-25 Kyocera Corporation Network-assisted transmission collision avoidance in vehicle-to-vehicle communications

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018084608A2 (en) * 2016-11-03 2018-05-11 Lg Electronics Inc. Method for determining retransmission numbers of sidelink data in wireless communication system and a device therefor
WO2018084614A1 (en) * 2016-11-02 2018-05-11 Samsung Electronics Co., Ltd. Resource selection method and corresponding equipment
US20180220280A1 (en) * 2017-01-31 2018-08-02 Qualcomm Incorporated Vehicle-to-everything feedback channel design
WO2018174677A1 (en) * 2017-03-24 2018-09-27 Samsung Electronics Co., Ltd. Method and apparatus for performing data transmission based on multiple transmission time intervals, for transmitting control information, and for transmitting data by employing multiple ports

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013055034A1 (en) 2011-10-11 2013-04-18 Lg Electronics Inc. Method of transmitting and receiving packets in wireless local area network system and apparatus for supporting the same
EP3122109A4 (en) * 2014-03-20 2018-02-28 Kyocera Corporation Communication control method and user terminal
CN105338464B (en) * 2014-06-17 2020-10-20 索尼公司 Electronic device and wireless communication method on user equipment side in wireless communication system
CN105451211B (en) * 2014-09-25 2019-12-27 中兴通讯股份有限公司 Method and apparatus for device-to-device communication
US10237030B2 (en) 2014-11-03 2019-03-19 Qualcomm Incorporated Communicating hybrid automatic repeat/request (HARQ) feedback in wireless communications
US9762368B2 (en) 2015-04-10 2017-09-12 Motorola Mobility Llc In-device coexistence with other technologies in LTE license assisted access operation
US10141987B2 (en) 2015-05-15 2018-11-27 Lg Electronics Inc. Method for feeding back reference signal information in multi-antenna wireless communication system and apparatus therefor
CN107197528B (en) * 2016-03-14 2020-12-25 华为技术有限公司 Method and device for scheduling and allocating resources
US10862650B2 (en) 2016-06-08 2020-12-08 Lg Electronics Inc. Method for uplink communication by terminal in mmWave communication system and terminal
US10631271B2 (en) * 2016-08-25 2020-04-21 Qualcomm Incorporated Autonomous resource selection for multiple transmissions in device-to-device communications
US20180123767A1 (en) * 2016-11-02 2018-05-03 Huawei Technologies Co., Ltd. System and Method for Reliable Transmission in Communications Systems
EP3571796A1 (en) 2017-01-23 2019-11-27 Sony Mobile Communications Inc. Coverage enhancement and fast acknowledgement
CN116095854A (en) * 2017-06-27 2023-05-09 苹果公司 Uplink control information transmission and hybrid automatic repeat request processing identification
US11140697B2 (en) * 2018-04-11 2021-10-05 Telefonaktiebolaget Lm Ericsson (Publ) Technique for sidelink feedback transmissions
US11108507B2 (en) * 2018-10-04 2021-08-31 Lg Electronics Inc. Method and apparatus for transmitting sidelink HARQ feedback in NR V2X

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018084614A1 (en) * 2016-11-02 2018-05-11 Samsung Electronics Co., Ltd. Resource selection method and corresponding equipment
WO2018084608A2 (en) * 2016-11-03 2018-05-11 Lg Electronics Inc. Method for determining retransmission numbers of sidelink data in wireless communication system and a device therefor
US20180220280A1 (en) * 2017-01-31 2018-08-02 Qualcomm Incorporated Vehicle-to-everything feedback channel design
WO2018174677A1 (en) * 2017-03-24 2018-09-27 Samsung Electronics Co., Ltd. Method and apparatus for performing data transmission based on multiple transmission time intervals, for transmitting control information, and for transmitting data by employing multiple ports

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
""R1-1811263-Sidelink Resource Allocation Mechanism for NR V2X"", 3GPP TSG_RAN\\WG1_RL1 *

Also Published As

Publication number Publication date
US20200235848A1 (en) 2020-07-23
US11239941B2 (en) 2022-02-01
WO2020150696A2 (en) 2020-07-23
EP3912294A2 (en) 2021-11-24
WO2020150696A3 (en) 2020-10-22
CN113302862B (en) 2024-06-07

Similar Documents

Publication Publication Date Title
CN112997442B (en) Configuring a transmit configuration indication state on an initial set of control resources
CN111316569B (en) Method and apparatus for wireless communication at a wireless device
CN111713033B (en) Downlink transmission beam configuration techniques for wireless communications
CN111869130A (en) Beam switching and beam failure recovery
CN111937322B (en) Physical uplink control channel reliability enhancement
CN113302986B (en) Power control in full duplex communications
CN113302862B (en) Feedback techniques for wireless communications
CN111357384B (en) Method and apparatus for adaptive media sensing threshold
CN111149413A (en) Listen before talk on demand
CN111165057A (en) Asynchronous single beam directional listen before talk
CN113170354B (en) Transmission configuration for initial control resource set indicates status ordering
CN111149417A (en) Retention repetition for deafness avoidance
CN113615307A (en) Techniques for managing Sounding Reference Signal (SRS) transmissions in a shared radio frequency spectrum
CN113748696A (en) Channel bandwidth attribute per band user equipment capability reporting
CN113228775A (en) Transmission configuration indication determination for shared data channels
CN112970305A (en) Control resource set monitoring rules based on active quasi co-location assumption capabilities of User Equipment (UE)
CN113812096A (en) Establishing millimeter wave relay links between user equipment using base station coordination
CN111937341A (en) Physical downlink shared channel reception when physical downlink control channels with different spatial quasi-co-location hypotheses are mapped to the same control resource set
CN113785610A (en) Radio link maintenance for sidelink wireless communications
CN112956265A (en) Active transfer configuration indication state
CN113196806B (en) Co-channel coexistence of multiple wireless communication technologies
CN112088564A (en) Grant-free configurable scheduling request
CN111357338A (en) Uplink transmission without uplink control and measurement
CN114258659A (en) Default-admission co-location hypothesis for cross-carrier reference signal triggering
CN114375551A (en) Time domain behavior of SINR measurements versus QCL

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant